Find flights
When to book
Airlines
FAQs

Cheap flights from Cardiff to Heidelberg from £101

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 16/7. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — FRA
10 Aug — 17 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Cardiff to Heidelberg

Enter your travel dates to find the best prices.

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 11 July 2026.

Mon 17/822:10
CWL
-
FRA
1 stop11h 05m
Multiple Airlines
Mon 31/820:40
FRA
-
CWL
1 stop27h 10m
Multiple Airlines
Deal found 7/7£174
Tue 18/823:15
CWL
-
FRA
1 stop10h 00m
Multiple Airlines
Thu 20/810:55
FRA
-
CWL
1 stop12h 30m
Multiple Airlines
Deal found 9/7£195
Sun 23/821:45
CWL
-
FRA
1 stop11h 30m
Multiple Airlines
Sun 30/807:00
FRA
-
CWL
1 stop15h 20m
Multiple Airlines
Deal found 9/7£202
Fri 14/822:45
CWL
-
FRA
1 stop10h 30m
Multiple Airlines
Fri 21/818:00
FRA
-
CWL
2 stops13h 55m
Multiple Airlines
Deal found 11/7£218
Fri 14/817:15
CWL
-
FRA
1 stop16h 50m
KLM
Fri 21/818:40
FRA
-
CWL
1 stop15h 35m
KLM
Deal found 11/7£241
Mon 13/714:20
CWL
-
FRA
1 stop20h 50m
Multiple Airlines
Wed 15/704:45
FRA
-
CWL
1 stop8h 55m
Multiple Airlines
Deal found 9/7£242

Find flight deals from Cardiff to Heidelberg

Keep the following information in mind while searching for Cardiff to Heidelberg flight deals. Data was last updated 11 July 2026.

Round-trip from

£174

One-way from

£101

Popular in

September

Cheapest in

April

Average price

£313
17/8-31/8
  • 17/8-31/8
  • 2 total stops
  • 38h 15m total
  • Cardiff to Heidelberg
Search Deals
16/7
  • 16/7
  • 1 total stop
  • 13h 40m total
  • Cardiff to Heidelberg
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£41 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£12 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

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 11 July 2026.
Use the filters below to find and compare flights from Cardiff to Heidelberg that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

CardiffFrankfurt am Main

CWL - FRA

CWLFRA

Cardiff Wales

Sun 23/8

21:45-10:15

1 stop11h 30m

Frankfurt am Main

Sun 30/8

07:00-21:20

1 stop15h 20m

£202

CardiffFrankfurt am Main

CWL - FRA

CWLFRA

Cardiff Wales

Mon 17/8

22:10-10:15

1 stop11h 05m

Frankfurt am Main

Mon 31/8

18:40-22:50

2 stops29h 10m

£213

CardiffFrankfurt am Main

CWL - FRA

CWLFRA

Cardiff Wales

Fri 14/8

22:45-10:15

1 stop10h 30m

Frankfurt am Main

Fri 21/8

18:00-06:55

2 stops13h 55m

£218

CardiffFrankfurt am Main

CWL - FRA

CWLFRA

Cardiff Wales

Fri 14/8

17:15-11:05

1 stop16h 50m

Frankfurt am Main

Fri 21/8

18:40-09:15

1 stop15h 35m

£241

CardiffFrankfurt am Main

CWL - FRA

CWLFRA

Cardiff Wales

Tue 18/8

23:15-13:35

2 stops13h 20m

Frankfurt am Main

Thu 20/8

10:55-22:25

1 stop12h 30m

£244
Fastest return journey

CardiffFrankfurt am Main

CWL - FRA

CWLFRA

Cardiff Wales

Thu 13/8

09:45-18:00

1 stop7h 15m

Frankfurt am Main

Sat 22/8

18:40-09:15

1 stop15h 35m

£249

CardiffFrankfurt am Main

CWL - FRA

CWLFRA

Cardiff Wales

Mon 3/8

17:15-09:35

1 stop15h 20m

Frankfurt am Main

Tue 11/8

18:40-09:15

1 stop15h 35m

£259

CardiffFrankfurt am Main

CWL - FRA

CWLFRA

Cardiff Wales

Tue 4/8

17:15-09:35

1 stop15h 20m

Frankfurt am Main

Sun 9/8

18:40-09:15

1 stop15h 35m

£263
Cheapest one-way

CardiffFrankfurt am Main

CWL - FRA

CWLFRA

Cardiff Wales

Thu 16/7

06:55-21:35

1 stop13h 40m

£101

CardiffFrankfurt am Main

CWL - FRA

CWLFRA

Cardiff Wales

Sat 29/8

07:30-10:15

1 stop25h 45m

£120

Flights are sorted by cheapest return flights first.

Deals found on 11/7

Showing 1-10 of 13 resultsSorted by cheapest first
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

How much does it cost for a return flight from Cardiff to Heidelberg?

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 11 July 2026.
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
1,537 reviews
Check prices

Boarding

7.8

Overall

7.8

Comfort

7.7

Entertainment

7.2

Food

7.3

Crew

8.4

Reviews

1 / 20
10.0
Excellent

Bobby,Sept 2025

EDI - ATL

Food was above average but could be better, The flight was operated by Delta and was excellent
KLM
7.8
Good
1,537 reviews
KLM
7.8
Good
1,537 reviews
Check prices

Boarding

7.8

Overall

7.8

Comfort

7.7

Entertainment

7.2

Food

7.3

Crew

8.4

Reviews

1 / 20
10.0
Excellent

Bobby,Sept 2025

EDI - ATL

Food was above average but could be better, The flight was operated by Delta and was excellent

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 16h 50m. 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 11 July 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest£235Average£295FlexibilityNo cancel feeOn-time75%
Search KLM flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Cardiff to Heidelberg?

Cheapflights helps you search for flights from Cardiff to Heidelberg via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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.

Can Cheapflights notify me if prices for flights from Cardiff to Heidelberg become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.