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$458+ 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 10/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — FRA
May 5 — May 121
Mon 5/5
Mon 5/12
1 adult, Economy
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Cheapflights Tip: 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 April 30, 2025.

Round-trip from

$891
(Air Canada)

One-way from

$531
(Gurufare)

Popular in

June

Cheapest in

November

Average price

$1,255
From Lambert-St Louis to Heidelberg
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One-way flight from Lambert-St Louis to Heidelberg
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Highest demand for flights based on searches. 17% potential increase in price ($253 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 30, 2025.

This United Airlines deal was found by Cheapflights users on 4/27. 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.
Sun 5/115:29 pmSTL - FRA
1 stop33h 26mUnited Airlines
Wed 5/215:05 pmFRA - STL
1 stop26h 31mUnited Airlines
Deal found 4/27$875
This FlightHub deal was found by Cheapflights users on 4/27. 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.
Sun 10/1212:28 pmSTL - FRA
1 stop11h 52mLufthansa
Fri 10/2410:40 amFRA - STL
Nonstop9h 50mLufthansa
Deal found 4/27$880
This FlightHub deal was found by Cheapflights users on 4/27. 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.
Sun 10/123:30 pmSTL - FRA
Nonstop8h 55mMultiple Airlines
Thu 10/232:00 pmFRA - STL
1 stop12h 33mMultiple Airlines
Deal found 4/27$882
This Air Canada deal was found by Cheapflights users on 4/27. 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.
Tue 10/141:30 pmSTL - FRA
1 stop11h 40mAir Canada
Thu 10/2310:00 amFRA - STL
1 stop12h 18mAir Canada
Deal found 4/27$883
This Delta deal was found by Cheapflights users on 4/28. 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.
Wed 10/811:51 amSTL - FRA
1 stop14h 04mDelta
Thu 10/1611:00 amFRA - STL
1 stop12h 51mDelta
Deal found 4/28$891
This Scandinavian Airlines deal was found by Cheapflights users on 4/28. 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 10/73:30 pmSTL - FRA
2 stops16h 10mScandinavian Airlines
Sun 10/123:25 pmFRA - STL
2 stops39h 14mScandinavian Airlines
Deal found 4/28$899
This Orbitz deal was found by Cheapflights users on 4/29. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/316:10 pmSTL - FRA
1 stop31h 35mIberia
Sun 9/710:45 amFRA - STL
1 stop18h 42mIberia
Deal found 4/29$912
This American Airlines deal was found by Cheapflights users on 4/29. 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.
Fri 5/169:36 amSTL - FRA
1 stop14h 44mAmerican Airlines
Fri 5/309:20 amFRA - STL
2 stops17h 09mAmerican Airlines
Deal found 4/29$952
This KLM deal was found by Cheapflights users on 4/28. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/55:30 pmSTL - FRA
2 stops13h 05mKLM
Wed 10/157:00 amFRA - STL
2 stops15h 58mKLM
Deal found 4/28$975
This Cheapflightsfares deal was found by Cheapflights users on 4/29. 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.
Tue 5/610:31 amSTL - FRA
2 stops16h 44mAer Lingus
Tue 5/1310:55 amFRA - STL
2 stops17h 57mAer Lingus
Deal found 4/29$1,019

Cheapflights Fare Finder

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 April 30, 2025.
Use the filters below to find and compare flights from St. Louis to Heidelberg that are best for you.

Fly from

St. Louis

Fly to

Heidelberg

Route

Depart

Return

Price

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Sun 5/11

5:29 pm-9:55 am

1 stop33h 26m

Frankfurt am Main

Wed 5/21

5:05 pm-12:36 pm

1 stop26h 31m

$875

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Sun 10/12

12:28 pm-7:20 am

1 stop11h 52m

Frankfurt am Main

Fri 10/24

10:40 am-1:30 pm

Nonstop9h 50m

$880

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Sun 10/12

3:30 pm-7:25 am

Nonstop8h 55m

Frankfurt am Main

Thu 10/23

2:00 pm-7:33 pm

1 stop12h 33m

$882

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Tue 10/14

1:30 pm-8:10 am

1 stop11h 40m

Frankfurt am Main

Thu 10/23

10:00 am-3:18 pm

1 stop12h 18m

$883

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Wed 10/8

11:51 am-8:55 am

1 stop14h 04m

Frankfurt am Main

Thu 10/16

11:00 am-4:51 pm

1 stop12h 51m

$891

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Tue 10/7

3:30 pm-2:40 pm

2 stops16h 10m

Frankfurt am Main

Sun 10/12

3:25 pm-11:39 pm

2 stops39h 14m

$899

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Sun 8/31

6:10 pm-8:45 am

1 stop31h 35m

Frankfurt am Main

Sun 9/7

10:45 am-10:27 pm

1 stop18h 42m

$912

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Fri 5/16

9:36 am-7:20 am

1 stop14h 44m

Frankfurt am Main

Fri 5/30

9:20 am-7:29 pm

2 stops17h 09m

$952

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Sun 10/5

5:30 pm-1:35 pm

2 stops13h 05m

Frankfurt am Main

Wed 10/15

7:00 am-3:58 pm

2 stops15h 58m

$975

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Sun 5/11

10:31 am-7:55 pm

2 stops26h 24m

Frankfurt am Main

Sun 5/18

10:55 am-11:51 pm

2 stops19h 56m

$1,071

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 22 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.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Heidelberg

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 April 25, 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 $1,086). 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 April 30, 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 April 30, 2025.
To help decide which airline to fly from St. Louis to Heidelberg, see what other customers have to say about Delta, KLM and United Airlines. 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
7,936 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

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
7,936 reviews
Delta
8.0
Very good
7,936 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

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
1,333 reviews
Delta
8.0
Very good
7,936 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

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.
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,936 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

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.
Scandinavian Airlines
7.3
Good
1,349 reviews
Delta
8.0
Very good
7,936 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

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.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,936 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

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 Aer Lingus, with whom users have recently found tickets for as low as $531. However, be on the lookout for offers from Iberia 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 $472. On average you can expect to pay $1,920. The most popular route, (Lambert-St Louis - Frankfurt am Main), can usually be booked for $827.

  • 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 $1,086). 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 April 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$576Average$983FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$629Average$969FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$788Average$1,161FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$814Average$1,384FlexibilityNo cancel feeOn-time76%
KLMCheapest$877Average$1,120FlexibilityNo cancel feeOn-time75%
DeltaCheapest$892Average$1,227FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$921Average$1,304FlexibilityNo cancel feeOn-time67%

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