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Heidelberg

$324+ Cheap flights from St. Louis (STL) to Heidelberg, Germany

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 3/30. Fares are subject to change and may not be available on all flights or dates of travel.
STL — FRA
Mar 19 — Mar 261
Wed 3/19
Wed 3/26
1 adult, Economy
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The best prices from Lambert-St Louis to Heidelberg are usually found in November or January, booked 32 days in advance, depart on a Thursday or Monday and return on a Tuesday

Cheap flight deals from St. Louis to Heidelberg

Keep the following information in mind while searching for St. Louis to Heidelberg flight deals. Data was last updated March 14, 2025.

Round-trip from

$698
(Finnair)

One-way from

$324
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$1,068
From Lambert-St Louis to Heidelberg
Search Deals
One-way flight from Lambert-St Louis to Heidelberg
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Highest demand for flights based on searches. 18% potential increase in price ($274 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($34 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Find flight deals from St. Louis to Heidelberg

Cheapest flights from St. Louis to Heidelberg
Explore the most affordable flight options available from St. Louis to Heidelberg. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 14, 2025.

This American Airlines deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/217:34 amSTL - FRA
1 stop16h 46mAmerican Airlines
Tue 11/410:50 amFRA - STL
1 stop18h 39mAmerican Airlines
Deal found 3/13$638
This Finnair deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/710:36 amSTL - FRA
1 stop15h 09mFinnair
Wed 5/1410:55 amFRA - STL
1 stop14h 32mFinnair
Deal found 3/13$698
This Justfly.com deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/610:36 amSTL - FRA
1 stop15h 09mBritish Airways
Thu 5/2210:55 amFRA - STL
1 stop15h 34mBritish Airways
Deal found 3/13$736
This Mytrip deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1112:15 pmSTL - FRA
3 stops17h 45mMultiple Airlines
Fri 4/252:00 pmFRA - STL
3 stops28h 45mMultiple Airlines
Deal found 3/13$767
This Expedia deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/23:08 pmSTL - FRA
1 stop34h 37mIberia
Mon 8/117:45 pmFRA - STL
2 stops31h 02mIberia
Deal found 3/13$783
This United Airlines deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/281:27 pmSTL - FRA
1 stop11h 58mUnited Airlines
Tue 11/49:45 amFRA - STL
3 stops36h 36mUnited Airlines
Deal found 3/12$813
This Air Canada deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/2611:05 amSTL - FRA
2 stops18h 05mAir Canada
Tue 4/15:05 pmFRA - STL
2 stops26h 15mAir Canada
Deal found 3/12$826
This Delta deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/271:48 pmSTL - FRA
1 stop12h 02mDelta
Tue 4/111:00 amFRA - STL
1 stop12h 48mDelta
Deal found 3/13$887
This FlightHub deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/225:35 pmSTL - FRA
1 stop13h 30mLufthansa
Wed 4/3010:40 amFRA - STL
Nonstop9h 50mLufthansa
Deal found 3/12$920
This AirNGo deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/41:48 pmSTL - FRA
1 stop13h 02mVirgin Atlantic
Fri 4/1810:40 amFRA - STL
1 stop14h 16mVirgin Atlantic
Deal found 3/12$944
This Cheapflightsfares deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/2611:55 amSTL - FRA
2 stops16h 10mAer Lingus
Tue 4/110:55 amFRA - STL
2 stops18h 23mAer Lingus
Deal found 3/13$1,007
This Scandinavian Airlines deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/71:30 pmSTL - FRA
2 stops23h 15mScandinavian Airlines
Tue 10/147:00 amFRA - STL
3 stops20h 47mScandinavian Airlines
Deal found 3/12$1,013

Find flights from St. Louis to Heidelberg within your budget

Customize your flight search to find flights from St. Louis 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 2,558,603 searches. Data last updated March 14, 2025.

Fly from

St. Louis

Fly to

Heidelberg

Route

Depart

Return

Price

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Wed 5/7

10:36 am-8:45 am

1 stop15h 09m

Frankfurt am Main

Wed 5/14

10:55 am-6:27 pm

1 stop14h 32m

$698

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Wed 5/7

1:38 pm-1:50 pm

2 stops17h 12m

Frankfurt am Main

Wed 5/14

12:10 pm-9:52 pm

2 stops16h 42m

$717

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Tue 5/6

10:36 am-8:45 am

1 stop15h 09m

Frankfurt am Main

Thu 5/22

10:55 am-7:29 pm

1 stop15h 34m

$736

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Fri 4/11

12:15 pm-1:00 pm

3 stops17h 45m

Frankfurt am Main

Fri 4/25

2:00 pm-11:45 am

3 stops28h 45m

$767

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Wed 5/7

5:29 pm-2:05 pm

1 stop13h 36m

Frankfurt am Main

Wed 5/21

10:40 am-1:30 pm

Nonstop9h 50m

$886

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Thu 3/27

1:48 pm-7:50 am

1 stop12h 02m

Frankfurt am Main

Tue 4/1

11:00 am-4:48 pm

1 stop12h 48m

$887

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Tue 5/6

1:30 pm-8:10 am

1 stop11h 40m

Frankfurt am Main

Tue 5/20

9:55 am-12:19 pm

2 stops33h 24m

$904

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Tue 4/22

1:12 pm-12:10 pm

2 stops15h 58m

Frankfurt am Main

Wed 4/30

9:55 am-3:47 pm

3 stops36h 52m

$913

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Sat 5/10

3:58 pm-8:45 am

1 stop33h 47m

Frankfurt am Main

Fri 5/23

12:10 pm-11:51 pm

2 stops18h 41m

$948

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Wed 3/26

11:55 am-10:05 am

2 stops16h 10m

Frankfurt am Main

Tue 4/1

10:55 am-10:18 pm

2 stops18h 23m

$1,007

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/13

Showing 1-10 of 25 results
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Best time to book a flight from St. Louis to Heidelberg

Have a flexible travel schedule? Discover the best time to fly to Heidelberg from St. Louis with our price prediction graph.
Estimated round-trip 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.

Travel insights for flights from St. Louis to Heidelberg

Get recent, data-driven insights about flights from St. Louis to Heidelberg including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from St. Louis to Heidelberg?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Heidelberg. Price data was last updated on March 7, 2025.

The best time to book flights from St. Louis to Heidelberg is 32 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from St. Louis to Heidelberg?

Currently, January is the cheapest month in which you can book a flight from St. Louis to Heidelberg (average of $729). Flying from St. Louis to Heidelberg in June is currently the most expensive (average of $1,089). 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.

What is the cheapest time of day to fly from STL to HE1?

Find hourly flight availability from St. Louis to Heidelberg. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 14, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from St. Louis to Heidelberg as you normally would.

Rainfall in Heidelberg by month

Plan your trip to Heidelberg by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Heidelberg ranges from 1.6 - 2.8 inches per month. June is typically the wettest month, when rainfall can reach 2.8 in. January is typically the driest time to visit Heidelberg when rainfall is around 1.6 in.

Temperature in Heidelberg by month

Plan your trip to Heidelberg by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Heidelberg, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 64.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 33.8 F).

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 March 14, 2025.
To help decide which airline to fly from St. Louis to Heidelberg, see what other customers have to say about Delta, Alaska Airlines and KLM. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,944 reviews

Comfort

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very good
7,944 reviews
Delta
8.0
Very good
7,944 reviews

Comfort

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Alaska Airlines
8.0
Very good
9,734 reviews
Delta
8.0
Very good
7,944 reviews

Comfort

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM
7.8
Good
1,320 reviews
Delta
8.0
Very good
7,944 reviews

Comfort

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Finnair
7.6
Good
1,268 reviews
Delta
8.0
Very good
7,944 reviews

Comfort

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Austrian Airlines
7.6
Good
766 reviews
Delta
8.0
Very good
7,944 reviews

Comfort

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from St. Louis 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 St. Louis to Heidelberg?

    Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Heidelberg. On average, Lambert-St Louis has 0 outbound flights to Heidelberg per day from 7 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

  • What are the cheapest airlines to fly from St. Louis to Heidelberg one-way?

    The cheapest airline one-way is Iberia, with whom users have recently found tickets for as low as $538. However, be on the lookout for offers from Scandinavian Airlines and Lufthansa, as they are both options that can get you from St. Louis to Heidelberg for a low price.

  • What are the cheapest flights from St. Louis to Heidelberg?

    The cheapest flight price from St. Louis to Heidelberg is $505. On average you can expect to pay $2,280. The most popular route, (Lambert-St Louis - Frankfurt am Main), can usually be booked for $698.

  • Can I find deals for flights from St. Louis to Heidelberg that include hotel bookings?

    Yes. In addition to deals on St. Louis to Heidelberg flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Heidelberg?

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

  • Can I find deals for business class flights from St. Louis to Heidelberg?

    Yes. Cheapflights offers flight deals from St. Louis 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 St. Louis to Heidelberg?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Heidelberg (average of $729). Flying from St. Louis to Heidelberg in June is currently the most expensive (average of $1,089). 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 7 airlines flying from St. Louis to Heidelberg

Discover the top 7 airlines that operate flights from St. Louis 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 2,558,603 searches. Data last updated March 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$576Average$983FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$586Average$969FlexibilityNo cancel feeOn-time70%
DeltaCheapest$685Average$1,172FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$736Average$1,058FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$779Average$1,187FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$800Average$1,428FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$1,001Average$1,301FlexibilityNo cancel feeOn-time67%
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