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Cheap flights from Cardiff to Heidelberg from £148

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 8/8. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — FRA
20 Jul — 27 Jul1
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 15 July 2025.

Round-trip from

£238

One-way from

£148

Popular in

May

Cheapest in

October

Average price

£313
KLM
  • KLM
  • 12/8-19/8
  • 3 total stops
  • 18h 45m total
  • Cardiff to Heidelberg
Search Deals
Air France
  • Air France
  • 8/8
  • 2 total stops
  • 22h 10m total
  • Cardiff to Heidelberg
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (£60 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£13 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2025
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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 15 July 2025.

Tue 12/809:50CWL - FRA
2 stops11h 15mMultiple Airlines
Tue 19/810:15FRA - CWL
1 stop7h 30mMultiple Airlines
Deal found 13/7£238
Tue 12/817:15CWL - FRA
1 stop15h 20mKLM
Tue 19/807:00FRA - CWL
1 stop3h 15mKLM
Deal found 13/7£243
Tue 12/817:15CWL - FRA
2 stops14h 45mAir France
Tue 19/819:55FRA - CWL
2 stops21h 50mAir France
Deal found 13/7£255

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 15 July 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

Tue 12/8

09:50-22:05

2 stops11h 15m

Frankfurt am Main

Tue 19/8

10:15-16:45

1 stop7h 30m

£238

CardiffFrankfurt am Main

CWL - FRA

CWLFRA

Cardiff Wales

Tue 12/8

17:15-09:35

1 stop15h 20m

Frankfurt am Main

Tue 19/8

07:00-09:15

1 stop3h 15m

£243

CardiffFrankfurt am Main

CWL - FRA

CWLFRA

Cardiff Wales

Tue 12/8

17:15-09:00

2 stops14h 45m

Frankfurt am Main

Tue 19/8

19:55-16:45

2 stops21h 50m

£255

CardiffFrankfurt am Main

CWL - FRA

CWLFRA

Cardiff Wales

Fri 8/8

09:50-09:00

2 stops22h 10m

£148

CardiffFrankfurt am Main

CWL - FRA

CWLFRA

Cardiff Wales

Fri 8/8

09:50-17:45

1 stop6h 55m

£166

CardiffFrankfurt am Main

CWL - FRA

CWLFRA

Cardiff Wales

Fri 8/8

20:55-09:35

3 stops35h 40m

£198

CardiffFrankfurt am Main

CWL - FRA

CWLFRA

Cardiff Wales

Thu 11/9

12:00-22:40

2 stops33h 40m

£289

Flights are sorted by cheapest return flights first.

Deals found on 13/7

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 July is currently the most expensive (average of £255). 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 15 July 2025.
Check out reviews from past customers who have flown with KLM, Air France, andBritish Airways 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
1,372 reviews
Check prices

Entertainment

7.1

Comfort

7.7

Boarding

7.8

Overall

7.8

Crew

8.4

Food

7.3

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
1,372 reviews
KLM
7.8
Good
1,372 reviews
Check prices

Entertainment

7.1

Comfort

7.7

Boarding

7.8

Overall

7.8

Crew

8.4

Food

7.3

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.
Air France
7.5
Good
1,466 reviews
KLM
7.8
Good
1,372 reviews
Check prices

Entertainment

7.1

Comfort

7.7

Boarding

7.8

Overall

7.8

Crew

8.4

Food

7.3

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.
British Airways
6.6
Okay
7,134 reviews
KLM
7.8
Good
1,372 reviews
Check prices

Entertainment

7.1

Comfort

7.7

Boarding

7.8

Overall

7.8

Crew

8.4

Food

7.3

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.

  • What are the cheapest airlines to fly from Cardiff to Heidelberg one-way?

    The cheapest airline one-way is Air France, with whom users have recently found tickets for as low as £148. However, be on the lookout for offers from KLM and British Airways, as they are both options that can get you from Cardiff to Heidelberg for a low price.

  • 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 July is currently the most expensive (average of £255). 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 15 July 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest£182Average£325FlexibilityNo cancel feeOn-time75%
Search KLM flights

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

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