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Cheap flights from Cardiff to Heidelberg from £171

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 29/12. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — FRA
3 Sep — 10 Sep1
1 adult

Cheap flight deals from Cardiff to Heidelberg

Keep the following information in mind while searching for Cardiff to Heidelberg flight deals. Data was last updated 29 August 2025.

Round-trip from

£221

One-way from

£171

Popular in

May

Cheapest in

October

Average price

£294
18/9-24/9
  • 18/9-24/9
  • 3 total stops
  • 26h 30m total
  • Cardiff to Heidelberg
Search Deals
KLM
  • KLM
  • 29/12
  • 1 total stop
  • 4h 10m total
  • Cardiff to Heidelberg
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (£60 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£14 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2025
Search Deals

Find flight deals from Cardiff to Heidelberg

Cheapest flights from Cardiff to Heidelberg
Explore the most affordable flight options available from Cardiff to Heidelberg. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 August 2025.

Thu 18/917:15CWL - FRA
2 stops14h 45mMultiple Airlines
Wed 24/920:40FRA - CWL
1 stop11h 45mMultiple Airlines
Deal found 27/8£221
Sat 11/1009:00CWL - FRA
2 stops12h 00mMultiple Airlines
Sat 18/1021:10FRA - CWL
1 stop14h 25mMultiple Airlines
Deal found 27/8£235
Sun 12/1017:15CWL - FRA
1 stop3h 45mKLM
Sun 19/1019:20FRA - CWL
1 stop14h 55mKLM
Deal found 28/8£242
Sun 12/1017:15CWL - FRA
2 stops14h 45mAir France
Sun 19/1019:55FRA - CWL
2 stops21h 50mAir France
Deal found 28/8£244
Sun 12/1009:50CWL - FRA
1 stop11h 10mMultiple Airlines
Sun 19/1007:05FRA - CWL
2 stops10h 40mMultiple Airlines
Deal found 28/8£260
Wed 8/1020:30CWL - FRA
2 stops17h 50mMultiple Airlines
Fri 10/1020:40FRA - CWL
1 stop11h 50mMultiple Airlines
Deal found 28/8£264
Fri 31/1017:25CWL - FRA
1 stop4h 00mKLM
Sun 2/1118:30FRA - CWL
1 stop16h 20mKLM
Deal found 27/8£281

Cheapflights Fare Finder

 
Customise your flight search to find flights from Cardiff to Heidelberg that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 29 August 2025.
Use the filters below to find and compare flights from Cardiff to Heidelberg that are best for you.

Fly from

Cardiff

Fly to

Heidelberg

Route

Depart

Return

Price

CardiffFrankfurt am Main

CWL - FRA

CWLFRA

Cardiff Wales

Thu 18/9

17:15-09:00

2 stops14h 45m

Frankfurt am Main

Wed 24/9

20:40-07:25

1 stop11h 45m

£221

CardiffFrankfurt am Main

CWL - FRA

CWLFRA

Cardiff Wales

Sat 11/10

09:00-22:00

2 stops12h 00m

Frankfurt am Main

Sat 18/10

21:10-10:35

1 stop14h 25m

£235

CardiffFrankfurt am Main

CWL - FRA

CWLFRA

Cardiff Wales

Wed 28/1

17:25-22:25

1 stop4h 00m

Frankfurt am Main

Sat 31/1

10:15-16:55

1 stop7h 40m

£241

CardiffFrankfurt am Main

CWL - FRA

CWLFRA

Cardiff Wales

Sun 12/10

17:15-22:00

1 stop3h 45m

Frankfurt am Main

Sun 19/10

19:20-09:15

1 stop14h 55m

£242

CardiffFrankfurt am Main

CWL - FRA

CWLFRA

Cardiff Wales

Thu 18/9

17:15-09:35

1 stop15h 20m

Frankfurt am Main

Wed 24/9

17:55-09:15

1 stop16h 20m

£242

CardiffFrankfurt am Main

CWL - FRA

CWLFRA

Cardiff Wales

Sat 11/10

17:35-09:35

1 stop15h 00m

Frankfurt am Main

Sat 18/10

14:15-17:05

1 stop3h 50m

£242

CardiffFrankfurt am Main

CWL - FRA

CWLFRA

Cardiff Wales

Sun 12/10

17:15-09:00

2 stops14h 45m

Frankfurt am Main

Sun 19/10

19:55-16:45

2 stops21h 50m

£244

CardiffFrankfurt am Main

CWL - FRA

CWLFRA

Cardiff Wales

Sun 12/10

09:50-22:00

1 stop11h 10m

Frankfurt am Main

Sun 19/10

07:05-16:45

2 stops10h 40m

£260

CardiffFrankfurt am Main

CWL - FRA

CWLFRA

Cardiff Wales

Wed 8/10

20:30-15:20

2 stops17h 50m

Frankfurt am Main

Fri 10/10

20:40-07:30

1 stop11h 50m

£264

CardiffFrankfurt am Main

CWL - FRA

CWLFRA

Cardiff Wales

Mon 29/12

17:15-22:25

1 stop4h 10m

£171

Flights are sorted by cheapest return flights first.

Deals found on 27/8

Showing 1-10 of 12 results
1
2

Best time to book a flight from Cardiff to Heidelberg

Have a flexible travel schedule? Discover the best time to fly to Heidelberg from Cardiff with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Cardiff to Heidelberg

What is the cheapest month to book a flight from Cardiff to Heidelberg?

Currently, February is the cheapest month in which you can book a flight from Cardiff to Heidelberg (average of £187). Flying from Cardiff to Heidelberg in June is currently the most expensive (average of £247). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Heidelberg

Get insights into the airlines that provide service to Heidelberg. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heidelberg. Reviews last updated 29 August 2025.
Check out reviews from past customers who have flown with KLM from Cardiff to Heidelberg to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,383 reviews
Check prices

Overall

7.8

Entertainment

7.1

Food

7.3

Comfort

7.7

Boarding

7.8

Crew

8.4

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
KLM
7.8
Good
1,383 reviews
KLM
7.8
Good
1,383 reviews
Check prices

Overall

7.8

Entertainment

7.1

Food

7.3

Comfort

7.7

Boarding

7.8

Crew

8.4

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Related info for your journey

Find useful and relevant information for your journey from Cardiff to Heidelberg. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Cardiff to Heidelberg?

    Most people fly from Cardiff Wales (CWL) if they book a flight from Cardiff to Heidelberg. On average, Cardiff Wales has 0 outbound flights to Heidelberg per day from 1 airline. Cardiff Wales is conveniently located just 9.1 mi from Cardiff’s city center.

  • How long is the flight from Cardiff to Heidelberg?

    A quick flight from Cardiff to Heidelberg can take about 4h. KLM provides one of the quickest options available for as low as £241. The distance between Cardiff and Heidelberg is about 528 mi.

  • Can I find deals for flights from Cardiff to Heidelberg that include hotel bookings?

    Yes. In addition to deals on Cardiff to Heidelberg flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Cardiff to Heidelberg?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Cardiff to Heidelberg.

  • Can I find deals for business class flights from Cardiff to Heidelberg?

    Yes. Cheapflights offers flight deals from Cardiff to Heidelberg by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Cardiff to Heidelberg?

    Currently, February is the cheapest month in which you can book a flight from Cardiff to Heidelberg (average of £187). Flying from Cardiff to Heidelberg in June is currently the most expensive (average of £247). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Cardiff to Heidelberg

Discover the top airline that operate flights from Cardiff to Heidelberg. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 29 August 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest£204Average£324FlexibilityNo cancel feeOn-time75%
Search KLM flights

Fly with Cheapflights

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Why should you use Cheapflights to find cheap flight tickets from Cardiff to Heidelberg?

Cheapflights helps you find that perfect flight to Heidelberg from Cardiff by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Cardiff to Heidelberg with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Cardiff to Heidelberg flexibly with Cheapflights today.

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