What is the best way to travel from Aachen to Hamburg?
Looking for a trip? Check and compare all the available Buses, Trains and Carpool to Hamburg from Aachen. Look at different modes of transportation, search for the cheapest tickets, fastest rides and most popular stations, and see all 3 available companies to find your perfect trip!
What is the cheapest way to reach Hamburg from Aachen?
You can reach Hamburg with just £20 by taking a Carpool from BlaBlaCar, but there are many more cheap offers: we have selected the best ones for you for the next few days here.
-
FlixBus9h 15m001:30AachenWest Train Station10:45HamburgCentral Bus Station0EconomyA Bus from FlixBus goes from West Train Station, Aachen (Germany) at 26/04/2025 01:30:00 to Central Bus Station, Hamburg (Germany) arriving at 26/04/2025 10:45:00. 50 Economy ticket for £27 per person are available. Travel duration is 9h 15m
-
FlixBus9h 55m015:05AachenWest Train Station01:00HamburgCentral Bus Station0EconomyA Bus from FlixBus goes from West Train Station, Aachen (Germany) at 26/04/2025 15:05:00 to Central Bus Station, Hamburg (Germany) arriving at 27/04/2025 01:00:00. 50 Economy ticket for £35 per person are available. Travel duration is 9h 55m
-
FlixBus10h 0m008:00AachenWest Train Station18:00HamburgCentral Bus Station0EconomyA Bus from FlixBus goes from West Train Station, Aachen (Germany) at 26/04/2025 08:00:00 to Central Bus Station, Hamburg (Germany) arriving at 26/04/2025 18:00:00. 50 Economy ticket for £50 per person are available. Travel duration is 10h 0m
-
Deutsche Bahn7h 22m019:21AachenCentral Station02:43HamburgCentral Station0EconomyA Train from Deutsche Bahn goes from Central Station, Aachen (Germany) at 26/04/2025 19:21:00 to Central Station, Hamburg (Germany) arriving at 27/04/2025 02:43:00. 50 Economy ticket for £42 per person are available. Travel duration is 7h 22m
-
Deutsche Bahn6h 45m002:53AachenCentral Station09:38HamburgCentral Station0EconomyA Train from Deutsche Bahn goes from Central Station, Aachen (Germany) at 26/04/2025 02:53:00 to Central Station, Hamburg (Germany) arriving at 26/04/2025 09:38:00. 50 Economy ticket for £70 per person are available. Travel duration is 6h 45m
-
Deutsche Bahn4h 58m014:51AachenCentral Station19:49HamburgCentral Station0EconomyA Train from Deutsche Bahn goes from Central Station, Aachen (Germany) at 26/04/2025 14:51:00 to Central Station, Hamburg (Germany) arriving at 26/04/2025 19:49:00. 50 Economy ticket for £70 per person are available. Travel duration is 4h 58m
-
Deutsche Bahn5h 23m018:51AachenCentral Station00:14HamburgCentral Station0EconomyA Train from Deutsche Bahn goes from Central Station, Aachen (Germany) at 26/04/2025 18:51:00 to Central Station, Hamburg (Germany) arriving at 27/04/2025 00:14:00. 50 Economy ticket for £70 per person are available. Travel duration is 5h 23m
Cheapest Buses Saturday
Cheapest Trains Saturday
-
FlixBus9h 15m001:30AachenWest Train Station10:45HamburgCentral Bus Station0EconomyA Bus from FlixBus goes from West Train Station, Aachen (Germany) at 29/04/2025 01:30:00 to Central Bus Station, Hamburg (Germany) arriving at 29/04/2025 10:45:00. 50 Economy ticket for £23 per person are available. Travel duration is 9h 15m
-
FlixBus10h 0m008:00AachenWest Train Station18:00HamburgCentral Bus Station0EconomyA Bus from FlixBus goes from West Train Station, Aachen (Germany) at 29/04/2025 08:00:00 to Central Bus Station, Hamburg (Germany) arriving at 29/04/2025 18:00:00. 50 Economy ticket for £23 per person are available. Travel duration is 10h 0m
-
FlixBus9h 50m015:05AachenWest Train Station00:55HamburgCentral Bus Station0EconomyA Bus from FlixBus goes from West Train Station, Aachen (Germany) at 29/04/2025 15:05:00 to Central Bus Station, Hamburg (Germany) arriving at 30/04/2025 00:55:00. 50 Economy ticket for £32 per person are available. Travel duration is 9h 50m
Cheapest Buses Tuesday
-
FlixBus9h 15m001:30AachenWest Train Station10:45HamburgCentral Bus Station0EconomyA Bus from FlixBus goes from West Train Station, Aachen (Germany) at 30/04/2025 01:30:00 to Central Bus Station, Hamburg (Germany) arriving at 30/04/2025 10:45:00. 50 Economy ticket for £25 per person are available. Travel duration is 9h 15m
-
FlixBus9h 50m015:05AachenWest Train Station00:55HamburgCentral Bus Station0EconomyA Bus from FlixBus goes from West Train Station, Aachen (Germany) at 30/04/2025 15:05:00 to Central Bus Station, Hamburg (Germany) arriving at 01/05/2025 00:55:00. 50 Economy ticket for £25 per person are available. Travel duration is 9h 50m
-
FlixBus10h 0m008:00AachenWest Train Station18:00HamburgCentral Bus Station0EconomyA Bus from FlixBus goes from West Train Station, Aachen (Germany) at 30/04/2025 08:00:00 to Central Bus Station, Hamburg (Germany) arriving at 30/04/2025 18:00:00. 50 Economy ticket for £26 per person are available. Travel duration is 10h 0m
Cheapest Buses Wednesday
-
BlaBlaCar5h 10m008:00Aachen13:10Hamburg0EconomyA Car from BlaBlaCar goes from , Aachen (Germany) at 01/05/2025 08:00:00 to , Hamburg (Germany) arriving at 01/05/2025 13:10:00. 50 Economy ticket for £20 per person are available. Travel duration is 5h 10m
-
FlixBus9h 50m015:05AachenWest Train Station00:55HamburgCentral Bus Station0EconomyA Bus from FlixBus goes from West Train Station, Aachen (Germany) at 01/05/2025 15:05:00 to Central Bus Station, Hamburg (Germany) arriving at 02/05/2025 00:55:00. 50 Economy ticket for £26 per person are available. Travel duration is 9h 50m
-
FlixBus10h 0m008:00AachenWest Train Station18:00HamburgCentral Bus Station0EconomyA Bus from FlixBus goes from West Train Station, Aachen (Germany) at 01/05/2025 08:00:00 to Central Bus Station, Hamburg (Germany) arriving at 01/05/2025 18:00:00. 50 Economy ticket for £29 per person are available. Travel duration is 10h 0m
-
Deutsche Bahn7h 15m023:51AachenCentral Station07:06HamburgAltona Train Station0EconomyA Train from Deutsche Bahn goes from Central Station, Aachen (Germany) at 01/05/2025 23:51:00 to Altona Train Station, Hamburg (Germany) arriving at 02/05/2025 07:06:00. 50 Economy ticket for £27 per person are available. Travel duration is 7h 15m
-
Deutsche Bahn5h 40m017:51AachenCentral Station23:31HamburgAltona Train Station0EconomyA Train from Deutsche Bahn goes from Central Station, Aachen (Germany) at 01/05/2025 17:51:00 to Altona Train Station, Hamburg (Germany) arriving at 01/05/2025 23:31:00. 50 Economy ticket for £36 per person are available. Travel duration is 5h 40m
-
Deutsche Bahn6h 50m015:21AachenCentral Station22:11HamburgAltona Train Station0EconomyA Train from Deutsche Bahn goes from Central Station, Aachen (Germany) at 01/05/2025 15:21:00 to Altona Train Station, Hamburg (Germany) arriving at 01/05/2025 22:11:00. 50 Economy ticket for £39 per person are available. Travel duration is 6h 50m
Cheapest Carpool Thursday
Cheapest Buses Thursday
Cheapest Trains Thursday
-
BlaBlaCar5h 10m011:00Aachen16:10Hamburg0EconomyA Car from BlaBlaCar goes from , Aachen (Germany) at 02/05/2025 11:00:00 to , Hamburg (Germany) arriving at 02/05/2025 16:10:00. 50 Economy ticket for £26 per person are available. Travel duration is 5h 10m
-
Deutsche Bahn5h 55m002:53AachenCentral Station08:48HamburgAltona Train Station0EconomyA Train from Deutsche Bahn goes from Central Station, Aachen (Germany) at 02/05/2025 02:53:00 to Altona Train Station, Hamburg (Germany) arriving at 02/05/2025 08:48:00. 50 Economy ticket for £27 per person are available. Travel duration is 5h 55m
-
Deutsche Bahn5h 39m018:51AachenCentral Station00:30HamburgAltona Train Station0EconomyA Train from Deutsche Bahn goes from Central Station, Aachen (Germany) at 02/05/2025 18:51:00 to Altona Train Station, Hamburg (Germany) arriving at 03/05/2025 00:30:00. 50 Economy ticket for £27 per person are available. Travel duration is 5h 39m
-
Deutsche Bahn5h 13m004:51AachenCentral Station10:04HamburgAltona Train Station0EconomyA Train from Deutsche Bahn goes from Central Station, Aachen (Germany) at 02/05/2025 04:51:00 to Altona Train Station, Hamburg (Germany) arriving at 02/05/2025 10:04:00. 50 Economy ticket for £33 per person are available. Travel duration is 5h 13m
-
Deutsche Bahn5h 40m017:51AachenCentral Station23:31HamburgAltona Train Station0EconomyA Train from Deutsche Bahn goes from Central Station, Aachen (Germany) at 02/05/2025 17:51:00 to Altona Train Station, Hamburg (Germany) arriving at 02/05/2025 23:31:00. 50 Economy ticket for £33 per person are available. Travel duration is 5h 40m
Cheapest Carpool Friday
Cheapest Trains Friday
What are the fastest trips from Aachen to Hamburg?
You can get to Hamburg from Aachen in just 4h 58m with a Train from Deutsche Bahn. But this is just one option, click on any of the offers below to compare it with the other available modes of transportations.
-
Deutsche Bahn4h 58m014:51AachenCentral Station19:49HamburgCentral Station0EconomyA Train from Deutsche Bahn goes from Central Station, Aachen (Germany) at 26/04/2025 14:51:00 to Central Station, Hamburg (Germany) arriving at 26/04/2025 19:49:00. 50 Economy ticket for £70 per person are available. Travel duration is 4h 58m
-
Deutsche Bahn5h 4m014:51AachenCentral Station19:55HamburgDammtor Train Station0EconomyA Train from Deutsche Bahn goes from Central Station, Aachen (Germany) at 26/04/2025 14:51:00 to Dammtor Train Station, Hamburg (Germany) arriving at 26/04/2025 19:55:00. 50 Economy ticket for £70 per person are available. Travel duration is 5h 4m
-
Deutsche Bahn5h 23m018:51AachenCentral Station00:14HamburgCentral Station0EconomyA Train from Deutsche Bahn goes from Central Station, Aachen (Germany) at 26/04/2025 18:51:00 to Central Station, Hamburg (Germany) arriving at 27/04/2025 00:14:00. 50 Economy ticket for £70 per person are available. Travel duration is 5h 23m
-
Deutsche Bahn6h 45m002:53AachenCentral Station09:38HamburgCentral Station0EconomyA Train from Deutsche Bahn goes from Central Station, Aachen (Germany) at 26/04/2025 02:53:00 to Central Station, Hamburg (Germany) arriving at 26/04/2025 09:38:00. 50 Economy ticket for £70 per person are available. Travel duration is 6h 45m
-
FlixBus9h 15m001:30AachenWest Train Station10:45HamburgCentral Bus Station0EconomyA Bus from FlixBus goes from West Train Station, Aachen (Germany) at 26/04/2025 01:30:00 to Central Bus Station, Hamburg (Germany) arriving at 26/04/2025 10:45:00. 50 Economy ticket for £27 per person are available. Travel duration is 9h 15m
-
FlixBus9h 55m015:05AachenWest Train Station01:00HamburgCentral Bus Station0EconomyA Bus from FlixBus goes from West Train Station, Aachen (Germany) at 26/04/2025 15:05:00 to Central Bus Station, Hamburg (Germany) arriving at 27/04/2025 01:00:00. 50 Economy ticket for £35 per person are available. Travel duration is 9h 55m
-
FlixBus10h 0m008:00AachenWest Train Station18:00HamburgCentral Bus Station0EconomyA Bus from FlixBus goes from West Train Station, Aachen (Germany) at 26/04/2025 08:00:00 to Central Bus Station, Hamburg (Germany) arriving at 26/04/2025 18:00:00. 50 Economy ticket for £50 per person are available. Travel duration is 10h 0m
Fastest Trains Saturday
Fastest Buses Saturday
-
FlixBus9h 15m001:30AachenWest Train Station10:45HamburgCentral Bus Station0EconomyA Bus from FlixBus goes from West Train Station, Aachen (Germany) at 29/04/2025 01:30:00 to Central Bus Station, Hamburg (Germany) arriving at 29/04/2025 10:45:00. 50 Economy ticket for £23 per person are available. Travel duration is 9h 15m
-
FlixBus9h 50m015:05AachenWest Train Station00:55HamburgCentral Bus Station0EconomyA Bus from FlixBus goes from West Train Station, Aachen (Germany) at 29/04/2025 15:05:00 to Central Bus Station, Hamburg (Germany) arriving at 30/04/2025 00:55:00. 50 Economy ticket for £32 per person are available. Travel duration is 9h 50m
-
FlixBus10h 0m008:00AachenWest Train Station18:00HamburgCentral Bus Station0EconomyA Bus from FlixBus goes from West Train Station, Aachen (Germany) at 29/04/2025 08:00:00 to Central Bus Station, Hamburg (Germany) arriving at 29/04/2025 18:00:00. 50 Economy ticket for £23 per person are available. Travel duration is 10h 0m
Fastest Buses Tuesday
-
FlixBus9h 15m001:30AachenWest Train Station10:45HamburgCentral Bus Station0EconomyA Bus from FlixBus goes from West Train Station, Aachen (Germany) at 30/04/2025 01:30:00 to Central Bus Station, Hamburg (Germany) arriving at 30/04/2025 10:45:00. 50 Economy ticket for £25 per person are available. Travel duration is 9h 15m
-
FlixBus9h 50m015:05AachenWest Train Station00:55HamburgCentral Bus Station0EconomyA Bus from FlixBus goes from West Train Station, Aachen (Germany) at 30/04/2025 15:05:00 to Central Bus Station, Hamburg (Germany) arriving at 01/05/2025 00:55:00. 50 Economy ticket for £25 per person are available. Travel duration is 9h 50m
-
FlixBus10h 0m008:00AachenWest Train Station18:00HamburgCentral Bus Station0EconomyA Bus from FlixBus goes from West Train Station, Aachen (Germany) at 30/04/2025 08:00:00 to Central Bus Station, Hamburg (Germany) arriving at 30/04/2025 18:00:00. 50 Economy ticket for £26 per person are available. Travel duration is 10h 0m
Fastest Buses Wednesday
-
BlaBlaCar5h 10m008:00Aachen13:10Hamburg0EconomyA Car from BlaBlaCar goes from , Aachen (Germany) at 01/05/2025 08:00:00 to , Hamburg (Germany) arriving at 01/05/2025 13:10:00. 50 Economy ticket for £20 per person are available. Travel duration is 5h 10m
-
Deutsche Bahn5h 40m017:51AachenCentral Station23:31HamburgAltona Train Station0EconomyA Train from Deutsche Bahn goes from Central Station, Aachen (Germany) at 01/05/2025 17:51:00 to Altona Train Station, Hamburg (Germany) arriving at 01/05/2025 23:31:00. 50 Economy ticket for £36 per person are available. Travel duration is 5h 40m
-
Deutsche Bahn6h 50m015:21AachenCentral Station22:11HamburgAltona Train Station0EconomyA Train from Deutsche Bahn goes from Central Station, Aachen (Germany) at 01/05/2025 15:21:00 to Altona Train Station, Hamburg (Germany) arriving at 01/05/2025 22:11:00. 50 Economy ticket for £39 per person are available. Travel duration is 6h 50m
-
Deutsche Bahn7h 15m023:51AachenCentral Station07:06HamburgAltona Train Station0EconomyA Train from Deutsche Bahn goes from Central Station, Aachen (Germany) at 01/05/2025 23:51:00 to Altona Train Station, Hamburg (Germany) arriving at 02/05/2025 07:06:00. 50 Economy ticket for £27 per person are available. Travel duration is 7h 15m
-
FlixBus9h 50m015:05AachenWest Train Station00:55HamburgCentral Bus Station0EconomyA Bus from FlixBus goes from West Train Station, Aachen (Germany) at 01/05/2025 15:05:00 to Central Bus Station, Hamburg (Germany) arriving at 02/05/2025 00:55:00. 50 Economy ticket for £26 per person are available. Travel duration is 9h 50m
-
FlixBus10h 0m008:00AachenWest Train Station18:00HamburgCentral Bus Station0EconomyA Bus from FlixBus goes from West Train Station, Aachen (Germany) at 01/05/2025 08:00:00 to Central Bus Station, Hamburg (Germany) arriving at 01/05/2025 18:00:00. 50 Economy ticket for £29 per person are available. Travel duration is 10h 0m
Fastest Carpool Thursday
Fastest Trains Thursday
Fastest Buses Thursday
-
BlaBlaCar5h 10m011:00Aachen16:10Hamburg0EconomyA Car from BlaBlaCar goes from , Aachen (Germany) at 02/05/2025 11:00:00 to , Hamburg (Germany) arriving at 02/05/2025 16:10:00. 50 Economy ticket for £26 per person are available. Travel duration is 5h 10m
-
Deutsche Bahn5h 13m004:51AachenCentral Station10:04HamburgAltona Train Station0EconomyA Train from Deutsche Bahn goes from Central Station, Aachen (Germany) at 02/05/2025 04:51:00 to Altona Train Station, Hamburg (Germany) arriving at 02/05/2025 10:04:00. 50 Economy ticket for £33 per person are available. Travel duration is 5h 13m
-
Deutsche Bahn5h 39m018:51AachenCentral Station00:30HamburgAltona Train Station0EconomyA Train from Deutsche Bahn goes from Central Station, Aachen (Germany) at 02/05/2025 18:51:00 to Altona Train Station, Hamburg (Germany) arriving at 03/05/2025 00:30:00. 50 Economy ticket for £27 per person are available. Travel duration is 5h 39m
-
Deutsche Bahn5h 40m017:51AachenCentral Station23:31HamburgAltona Train Station0EconomyA Train from Deutsche Bahn goes from Central Station, Aachen (Germany) at 02/05/2025 17:51:00 to Altona Train Station, Hamburg (Germany) arriving at 02/05/2025 23:31:00. 50 Economy ticket for £33 per person are available. Travel duration is 5h 40m
-
Deutsche Bahn5h 55m002:53AachenCentral Station08:48HamburgAltona Train Station0EconomyA Train from Deutsche Bahn goes from Central Station, Aachen (Germany) at 02/05/2025 02:53:00 to Altona Train Station, Hamburg (Germany) arriving at 02/05/2025 08:48:00. 50 Economy ticket for £27 per person are available. Travel duration is 5h 55m
Fastest Carpool Friday
Fastest Trains Friday
Here you will find all operators and timetables for a
Bus from Aachen to Hamburg
What are the most popular stations in Aachen and Hamburg?
In Aachen, you will usually depart from Central Station, Elisenbrunnen Bus Stop or Rothe Erde Train Station, while in Hamburg you will be arriving at Central Bus Station, Central Station or Harburg Train Station, but there are many more stops to explore in both locations.
How do I decide? Some tips and tricks from our experience
Are you having trouble deciding on how to get to Hamburg from Aachen? With 5 connections between 3 Bus, Train and Carpool operators, it can be difficult to find the one ride that will make you happy. But we have some tips that can help you make the best informed decision. First of all, the best trip is always the one that meets all your needs, so make a list of all the things that you want from this journey and look for something that will satisfy all of them. Here we will go through some of the factors mostly commonly taken into consideration.
Look for the lowest price
Ticket price is usually the main concern: even if you can afford to pay more, why do it if there are cheaper options? Saving on the trip means that you can spend more on the vacation itself! Between Aachen and Hamburg, you can pay as low as £20 with a Carpool from BlaBlaCar.Travel duration
Time is also an important factor. An earlier departure may allow you to see a beautiful sunset or relax before an important event. And remember, time is money, so paying more for a shorter trip may be well worth it. For longer distances, flights are without doubt the best options, but be mindful of airport times and possible delays: a high-speed train may end up cheaper and faster! Here the quicker option is definitely the Train from Deutsche Bahn: you will get to Hamburg in just 4h 58m.Comfort makes all the difference
You should always take into account what your personal travelling preferences are. Is one hand luggage enough, or are you trasporting more? Would you like to have a snack during the journey? Can you relax in a busy compartment, or do you need space for yourself? Even among the same mode of transportation, different companies will offer you varying levels of comfort and amenities. The main operators connecting Aachen and Hamburg are Deutsche Bahn, FlixBus and BlaBlaCar, but be sure to check what they have to offer!Save money with deals, and always compare
One last tip? Even if you live in Aachen and Hamburg is your only destination, it may be wise to check the offers from and to nearby cities or, if you are flyng, nearby airports. Check the trips from Eilendorf or to Hamburg Airport, and look at flights from Liege Airport, and landing at Hamburg Airport. Comparing different routes may allow you to find deals or promotions you were not aware of. Consider also signing up to CheckMyBus to see even more exclusive promotions!Which companies offer a trip from Aachen to Hamburg?
The most popular companies between Aachen and Hamburg, are Deutsche Bahn, FlixBus and BlaBlaCar. Be sure to check their seat class offers and the amenities that they provide.
Bus companies: FlixBus
Train companies: Deutsche Bahn
All you need to know when you travel from Aachen to Hamburg
Check all information on comfort and services on all modes of transports from Aachen to Hamburg. See which seat classes are available, and what amenities are other advantages offered by the operators on your journey.
FAQs about the trip from Aachen to Hamburg
How can I reach Hamburg from Aachen?
Every day, there are on average 5 connections between Bus, Train and Carpool, with which you can get to Hamburg from Aachen.
How far is Hamburg from Aachen?
The distance between Aachen and Hamburg is 407.7 km.
What is the most ecofriendly mode of transport between Aachen and Hamburg?
Trains and buses are by far the greenest options, with trains surpassing buses on longer routes. Planes will always be the worst polluters, especially in shorter flights, were the emissions from the takeoff and landing are less offset by the distance.
On this particular route, a bus will emit, per person, a total of 11 kgs of CO2, a train 14 kgs, a car 69 kgs, and a flight 100 kgs.
What is the cheapest mode of transport from Aachen to Hamburg?
You can get to Hamburg with just £20 by taking a Carpool from BlaBlaCar.
What is the fastest way to get from Aachen to Hamburg?
While a plane is travelling fastest boarding and transfer to airport consumes a lot of time. Usually, high speed trains are better than flights if pure train travel time is below 4 hours. For this particular route, you can get to Hamburg in just 4h 58m with a Train from Deutsche Bahn.
More routes to Aachen and to Hamburg
Looking for more options? Here you can see the most popular routes to Aachen and to Hamburg. Simply click on a connection, and you’ll find all the details about the route!
- Trips to Aachen
- Amsterdam to Aachen
- Berlin to Aachen
- Brussels to Aachen
- Charleroi to Aachen
- Cologne/Bonn Airport to Aachen
- Dusseldorf Airport to Aachen
- Dusseldorf to Aachen
- Eindhoven to Aachen
- Essen to Aachen
- Frankfurt am Main to Aachen
- Hamburg to Aachen
- Hanover to Aachen
- Koblenz to Aachen
- Maastricht to Aachen
- Munich to Aachen
- Nuremberg to Aachen
- Paris Charles de Gaulle Airport to Aachen
- Paris to Aachen
- Regensburg to Aachen
- Rotterdam to Aachen
- Szczecin to Aachen
- Trier to Aachen
- Ulm to Aachen
- Trips to Hamburg
- Amsterdam to Hamburg
- Bayreuth to Hamburg
- Berlin Brandenburg Airport to Hamburg
- Berlin to Hamburg
- Bratislava to Hamburg
- Bremen to Hamburg
- Brussels to Hamburg
- Cologne to Hamburg
- Fehmarn to Hamburg
- Frankfurt am Main to Hamburg
- Friedrichshafen to Hamburg
- Hanover to Hamburg
- Innsbruck to Hamburg
- Kiel to Hamburg
- London to Hamburg
- Lübeck to Hamburg
- Munich to Hamburg
- Paris to Hamburg
- Salzburg to Hamburg
- Stuttgart Airport to Hamburg
- Stuttgart to Hamburg
- Vienna to Hamburg
- Warsaw to Hamburg
- Zurich to Hamburg