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Heidelberg

$417+ 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 11/5. Fares are subject to change and may not be available on all flights or dates of travel.
STL — FRA
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Heidelberg are usually found in October or November, booked 2 days in advance, depart on a Wednesday or Monday and return on a Monday

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 October 30, 2025.

This Finnair deal was found by Cheapflights users on 10/30. 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 12/247:05 amSTL - FRA
1 stop18h 45mMultiple Airlines
Mon 2/27:20 pmFRA - STL
2 stops31h 09mMultiple Airlines
Deal found 10/30$650
This Finnair deal was found by Cheapflights users on 10/30. 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.
Fri 11/282:08 pmSTL - FRA
1 stop11h 42mMultiple Airlines
Fri 12/510:50 amFRA - STL
1 stop13h 18mMultiple Airlines
Deal found 10/30$699
This American Airlines deal was found by Cheapflights users on 10/30. 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 11/287:11 amSTL - FRA
1 stop18h 39mAmerican Airlines
Fri 12/510:50 amFRA - STL
2 stops16h 48mAmerican Airlines
Deal found 10/30$703
This Air Canada deal was found by Cheapflights users on 10/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/264:05 pmSTL - FRA
2 stops56h 20mAir Canada
Fri 1/235:10 pmFRA - STL
2 stops28h 18mAir Canada
Deal found 10/29$852
This Kiwi.com deal was found by Cheapflights users on 10/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/243:50 pmSTL - FRA
Nonstop8h 40mLufthansa
Mon 2/212:55 pmFRA - STL
1 stop13h 32mLufthansa
Deal found 10/30$871
This Travelocity deal was found by Cheapflights users on 10/30. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/266:35 pmSTL - FRA
2 stops53h 05mMultiple Airlines
Fri 1/2310:45 amFRA - STL
Nonstop10h 10mMultiple Airlines
Deal found 10/30$876
This United Airlines deal was found by Cheapflights users on 10/30. 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.
Fri 12/264:05 pmSTL - FRA
1 stop12h 05mUnited Airlines
Fri 1/2310:45 amFRA - STL
Nonstop10h 10mUnited Airlines
Deal found 10/30$910

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 October 30, 2025.

Round-trip from

$649
(Finnair)

One-way from

$417
(Thrive Travel)

Popular in

June

Cheapest in

October

Average price

$1,005
From Lambert-St Louis to Heidelberg
Search Deals
One-way flight from Lambert-St Louis to Heidelberg
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($242 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($43 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 October 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

Wed 4/1

7:35 am-7:20 am

1 stop16h 45m

Frankfurt am Main

Fri 4/10

9:20 am-5:13 pm

1 stop14h 53m

$649

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Fri 11/28

2:08 pm-8:50 am

1 stop11h 42m

Frankfurt am Main

Fri 12/5

10:50 am-5:08 pm

1 stop13h 18m

$699

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Fri 11/28

7:11 am-8:50 am

1 stop18h 39m

Frankfurt am Main

Fri 12/5

10:50 am-8:38 pm

2 stops16h 48m

$703

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Wed 4/1

3:30 pm-7:25 am

Nonstop8h 55m

Frankfurt am Main

Fri 4/10

10:40 am-1:30 pm

Nonstop9h 50m

$799

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Wed 3/18

4:50 pm-7:30 am

Nonstop8h 40m

Frankfurt am Main

Fri 3/27

10:45 am-2:55 pm

Nonstop10h 10m

$829

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Sat 3/28

6:30 pm-7:10 am

2 stops30h 40m

Frankfurt am Main

Tue 4/7

9:55 am-4:40 pm

2 stops37h 45m

$843

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Tue 4/7

5:18 pm-2:05 pm

1 stop13h 47m

Frankfurt am Main

Wed 4/29

5:05 pm-3:21 pm

2 stops29h 16m

$850

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Wed 3/18

5:30 am-8:50 am

1 stop21h 20m

Frankfurt am Main

Sun 3/22

10:50 am-7:02 pm

1 stop14h 12m

$883

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Fri 3/27

5:28 am-7:15 am

1 stop19h 47m

Frankfurt am Main

Tue 3/31

10:55 am-6:15 pm

1 stop14h 20m

$899

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Wed 11/5

3:50 pm-7:30 am

Nonstop8h 40m

$417

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 18 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 October 24, 2025.

The best time to book flights from St. Louis to Heidelberg is 2 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, October is the cheapest month in which you can book a flight from St. Louis to Heidelberg (average of $650). Flying from St. Louis to Heidelberg in May is currently the most expensive (average of $873). 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 October 30, 2025.

It’s typically best to fly out from St. Louis to Heidelberg in the evening. Doing so could potentially save you 33% on the flight price compared to flying in the afternoon, which is usually more expensive.

How much does it cost to fly round-trip from St. Louis 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 October 30, 2025.
Get a feel of what it's like to fly with United Airlines, American Airlines, and Air Canada from St. Louis to Heidelberg by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,998 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Crew

8.1

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
8,998 reviews
United Airlines
7.4
Good
8,998 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Crew

8.1

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
American Airlines
7.2
Good
11,033 reviews
United Airlines
7.4
Good
8,998 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Crew

8.1

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Air Canada
7.1
Good
10,378 reviews
United Airlines
7.4
Good
8,998 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Crew

8.1

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Lufthansa
6.8
Okay
7,541 reviews
United Airlines
7.4
Good
8,998 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Crew

8.1

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
British Airways
6.7
Okay
7,487 reviews
United Airlines
7.4
Good
8,998 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Crew

8.1

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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.

  • How long is the flight from St. Louis to Heidelberg?

    A quick flight from St. Louis to Heidelberg can take about 18h 39m. American Airlines provides one of the quickest options available for as low as $703. Airlines will cover a distance of 4577 mi.

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

    The cheapest flight price from St. Louis to Heidelberg is $431. On average you can expect to pay $2,204. The most popular route, (Lambert-St Louis - Frankfurt am Main), can usually be booked for $741.

  • 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, October is the cheapest month in which you can book a flight from St. Louis to Heidelberg (average of $650). Flying from St. Louis to Heidelberg in May is currently the most expensive (average of $873). 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

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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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$488Average$1,060FlexibilityNo cancel feeOn-time71%
DeltaCheapest$610Average$1,099FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$706Average$969FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$778Average$1,134FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$823Average$1,325FlexibilityNo cancel feeOn-time76%
KLMCheapest$841Average$1,115FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$921Average$1,319FlexibilityNo cancel feeOn-time67%

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