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Heidelberg

$356+ 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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — FRA
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Heidelberg are usually found in November or October, booked 69 days in advance, depart on a Tuesday or Wednesday and return on a Monday

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 September 17, 2025.

Round-trip from

$660
(Expedia)

One-way from

$356
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$1,161
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. 18% potential increase in price ($263 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($46 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 17, 2025.

This Expedia deal was found by Cheapflights users on 9/16. 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.
Mon 11/1711:44 amSTL - FRA
2 stops19h 46mScandinavian Airlines
Thu 11/273:15 pmFRA - STL
2 stops37h 43mScandinavian Airlines
Deal found 9/16$660
This Expedia deal was found by Cheapflights users on 9/14. 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.
Mon 10/203:59 pmSTL - FRA
2 stops20h 46mMultiple Airlines
Fri 10/247:20 amFRA - STL
2 stops21h 08mMultiple Airlines
Deal found 9/14$683
This Expedia deal was found by Cheapflights users on 9/15. 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.
Mon 12/11:55 pmSTL - FRA
2 stops17h 35mScandinavian Airlines
Sun 12/78:30 pmFRA - STL
2 stops31h 33mScandinavian Airlines
Deal found 9/15$750
This Scandinavian Airlines deal was found by Cheapflights users on 9/14. 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.
Mon 10/203:59 pmSTL - FRA
2 stops15h 41mScandinavian Airlines
Fri 10/247:00 amFRA - STL
3 stops23h 41mScandinavian Airlines
Deal found 9/14$789
This Scandinavian Airlines deal was found by Cheapflights users on 9/15. 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.
Wed 10/83:59 pmSTL - FRA
2 stops15h 41mScandinavian Airlines
Wed 10/153:20 pmFRA - STL
2 stops39h 21mScandinavian Airlines
Deal found 9/15$800
This Expedia deal was found by Cheapflights users on 9/17. 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.
Thu 12/41:55 pmSTL - FRA
2 stops17h 35mMultiple Airlines
Mon 12/87:55 amFRA - STL
2 stops20h 08mMultiple Airlines
Deal found 9/17$803
This Mytrip deal was found by Cheapflights users on 9/16. 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.
Tue 10/141:30 pmSTL - FRA
2 stops17h 35mMultiple Airlines
Tue 10/219:30 pmFRA - STL
2 stops24h 48mMultiple Airlines
Deal found 9/16$815
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 11/193:50 pmSTL - FRA
Nonstop8h 40mLufthansa
Wed 11/2610:45 amFRA - STL
Nonstop10h 10mLufthansa
Deal found 9/15$828
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Wed 11/193:50 pmSTL - FRA
Nonstop8h 40mUnited Airlines
Wed 11/269:45 amFRA - STL
2 stops32h 06mUnited Airlines
Deal found 9/15$840
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 12/33:50 pmSTL - FRA
Nonstop8h 40mLufthansa
Thu 12/111:30 pmFRA - STL
1 stop17h 12mLufthansa
Deal found 9/15$842
This FlightHub deal was found by Cheapflights users on 9/15. 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 11/188:00 amSTL - FRA
2 stops16h 25mAir Canada
Tue 11/259:45 amFRA - STL
2 stops37h 01mAir Canada
Deal found 9/15$844

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 September 17, 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

Mon 10/20

3:59 pm-7:45 pm

2 stops20h 46m

Frankfurt am Main

Fri 10/24

7:20 am-9:28 pm

2 stops21h 08m

$683

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Thu 12/4

1:55 pm-2:30 pm

2 stops17h 35m

Frankfurt am Main

Mon 12/8

7:55 am-9:03 pm

2 stops20h 08m

$803

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Wed 12/3

3:50 pm-7:30 am

Nonstop8h 40m

Frankfurt am Main

Thu 12/11

1:30 pm-11:42 pm

1 stop17h 12m

$842

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Wed 11/19

3:50 pm-7:30 am

Nonstop8h 40m

Frankfurt am Main

Thu 11/27

5:10 pm-12:28 pm

2 stops26h 18m

$846

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Sat 11/29

3:14 pm-7:25 am

2 stops33h 11m

Frankfurt am Main

Wed 12/10

5:10 pm-12:15 pm

2 stops26h 05m

$851

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Mon 11/17

11:20 am-11:40 am

1 stop17h 20m

Frankfurt am Main

Thu 11/27

5:10 pm-12:28 pm

2 stops26h 18m

$851

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Tue 11/18

5:24 pm-6:35 am

1 stop30h 11m

Frankfurt am Main

Thu 11/27

5:10 pm-3:29 pm

1 stop29h 19m

$852

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Sat 11/15

5:24 pm-6:35 am

1 stop30h 11m

Frankfurt am Main

Thu 11/27

5:10 pm-3:29 pm

1 stop29h 19m

$852

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Sat 11/15

4:05 pm-7:55 am

1 stop32h 50m

Frankfurt am Main

Thu 11/27

1:40 pm-12:28 pm

2 stops29h 48m

$853

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Sun 11/16

4:05 pm-11:10 am

1 stop12h 05m

Frankfurt am Main

Thu 11/27

1:40 pm-3:46 pm

2 stops33h 06m

$853

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 20 results
1
2

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 September 12, 2025.

The best time to book flights from St. Louis to Heidelberg is 69 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 $1,091). 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 September 17, 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.

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 September 17, 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
8,926 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.
United Airlines
7.4
Good
8,926 reviews
United Airlines
7.4
Good
8,926 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,926 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.
Air Canada
7.1
Good
10,000 reviews
United Airlines
7.4
Good
8,926 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.
Lufthansa
6.8
Okay
7,409 reviews
United Airlines
7.4
Good
8,926 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.
British Airways
6.7
Okay
7,367 reviews
United Airlines
7.4
Good
8,926 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.

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 8h 40m. Lufthansa provides one of the quickest options available for as low as $842. Airlines will cover a distance of 4577 mi. All flights are typically nonstop.

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

    The cheapest flight price from St. Louis to Heidelberg is $466. On average you can expect to pay $2,170. The most popular route, (Lambert-St Louis - Frankfurt am Main), can usually be booked for $660.

  • 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 $1,091). 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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$610Average$1,182FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$663Average$1,090FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$706Average$969FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$787Average$1,131FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$799Average$1,299FlexibilityNo cancel feeOn-time76%
KLMCheapest$841Average$1,091FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$921Average$1,301FlexibilityNo cancel feeOn-time67%

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