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Heidelberg

$379+ 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 11/7. Fares are subject to change and may not be available on all flights or dates of travel.
STL — FRA
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Heidelberg are usually found in November or August, booked 32 days in advance, depart on a Monday 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 July 31, 2025.

Round-trip from

$734
(Expedia)

One-way from

$406
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$1,386
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. 20% potential increase in price ($299 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($49 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 31, 2025.

This AirNGo deal was found by Cheapflights users on 7/30. 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 AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/124:05 pmSTL - FRA
1 stop12h 05mAir Canada
Wed 11/199:45 amFRA - STL
2 stops20h 00mAir Canada
Deal found 7/30$693
This flugladen.de deal was found by Cheapflights users on 7/30. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/123:50 pmSTL - FRA
Nonstop8h 40mMultiple Airlines
Wed 11/195:10 pmFRA - STL
1 stop29h 19mMultiple Airlines
Deal found 7/30$711
This CrystalTravel deal was found by Cheapflights users on 7/30. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/233:50 pmSTL - FRA
Nonstop8h 40mLufthansa
Wed 12/1710:45 amFRA - STL
Nonstop10h 10mLufthansa
Deal found 7/30$724
This United Airlines deal was found by Cheapflights users on 7/30. 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.
Wed 11/193:50 pmSTL - FRA
Nonstop8h 40mUnited Airlines
Wed 11/269:45 amFRA - STL
2 stops32h 06mUnited Airlines
Deal found 7/30$730
This Expedia deal was found by Cheapflights users on 7/30. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/103:36 pmSTL - FRA
2 stops16h 04mScandinavian Airlines
Wed 9/243:20 pmFRA - STL
2 stops39h 04mScandinavian Airlines
Deal found 7/30$734

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 July 31, 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 11/12

4:05 pm-11:10 am

1 stop12h 05m

Frankfurt am Main

Wed 11/19

9:45 am-10:45 pm

2 stops20h 00m

$693

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Wed 11/12

3:50 pm-7:30 am

Nonstop8h 40m

Frankfurt am Main

Wed 11/19

5:10 pm-3:29 pm

1 stop29h 19m

$711

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Sun 11/23

3:50 pm-7:30 am

Nonstop8h 40m

Frankfurt am Main

Wed 12/17

10:45 am-1:55 pm

Nonstop10h 10m

$722

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Wed 11/19

3:50 pm-7:30 am

Nonstop8h 40m

Frankfurt am Main

Wed 11/26

9:45 am-10:51 am

2 stops32h 06m

$730

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Wed 9/10

3:36 pm-2:40 pm

2 stops16h 04m

Frankfurt am Main

Wed 9/24

3:20 pm-11:24 pm

2 stops39h 04m

$734

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Fri 11/7

1:00 pm-4:55 pm

3 stops20h 55m

$379

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Sat 10/18

8:00 am-8:10 am

2 stops41h 10m

$490

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Sat 10/18

4:05 pm-6:30 am

1 stop31h 25m

$496

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Fri 11/7

3:50 pm-7:30 am

Nonstop8h 40m

$520

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Fri 10/17

10:10 am-8:45 am

1 stop15h 35m

$1,122

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 12 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 July 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 $1,088). 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 July 31, 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 July 31, 2025.
Get a feel of what it's like to fly with KLM, United Airlines, and Scandinavian Airlines 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.
KLM
7.8
Good
1,383 reviews

Comfort

7.7

Crew

8.4

Food

7.3

Overall

7.8

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
KLM
7.8
Good
1,383 reviews
KLM
7.8
Good
1,383 reviews

Comfort

7.7

Crew

8.4

Food

7.3

Overall

7.8

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
United Airlines
7.4
Good
8,900 reviews
KLM
7.8
Good
1,383 reviews

Comfort

7.7

Crew

8.4

Food

7.3

Overall

7.8

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Scandinavian Airlines
7.4
Good
1,457 reviews
KLM
7.8
Good
1,383 reviews

Comfort

7.7

Crew

8.4

Food

7.3

Overall

7.8

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Air Canada
7.1
Good
9,851 reviews
KLM
7.8
Good
1,383 reviews

Comfort

7.7

Crew

8.4

Food

7.3

Overall

7.8

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Iberia
7.0
Good
2,859 reviews
KLM
7.8
Good
1,383 reviews

Comfort

7.7

Crew

8.4

Food

7.3

Overall

7.8

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

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 Air Canada, with whom users have recently found tickets for as low as $490. However, be on the lookout for offers from United 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 $456. On average you can expect to pay $2,301. The most popular route, (Lambert-St Louis - Frankfurt am Main), can usually be booked for $622.

  • 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 $1,088). 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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$576Average$945FlexibilityNo cancel feeOn-time71%
DeltaCheapest$610Average$1,182FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$631Average$946FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$778Average$1,136FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$822Average$1,263FlexibilityNo cancel feeOn-time76%
KLMCheapest$845Average$1,091FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$921Average$1,303FlexibilityNo cancel feeOn-time67%

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