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$369+ 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 7/12. Fares are subject to change and may not be available on all flights or dates of travel.
STL — FRA
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Heidelberg are usually found in November or August, booked 32 days in advance, depart on a Monday or Thursday 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 June 12, 2025.

Round-trip from

$604
(American Airlines)

One-way from

$369
(Mytrip)

Popular in

June

Cheapest in

November

Average price

$1,669
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 ($294 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($48 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/10. 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 10/2112:50 pmSTL - FRA
1 stop11h 30mAmerican Airlines
Tue 11/410:55 amFRA - STL
1 stop13h 24mAmerican Airlines
Deal found 6/10$604
This Finnair deal was found by Cheapflights users on 6/11. 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 10/299:42 amSTL - FRA
2 stops17h 08mMultiple Airlines
Fri 11/710:55 amFRA - STL
2 stops17h 17mMultiple Airlines
Deal found 6/11$609
This United Airlines deal was found by Cheapflights users on 6/12. 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.
Wed 11/123:50 pmSTL - FRA
Nonstop8h 40mUnited Airlines
Thu 11/205:10 pmFRA - STL
2 stops28h 10mUnited Airlines
Deal found 6/12$633
This Booking.com deal was found by Cheapflights users on 6/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1210:30 amSTL - FRA
2 stops17h 40mAir Canada
Thu 11/209:45 amFRA - STL
2 stops36h 44mAir Canada
Deal found 6/12$638
This Lufthansa deal was found by Cheapflights users on 6/11. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2911:49 amSTL - FRA
1 stop13h 36mLufthansa
Fri 11/710:45 amFRA - STL
Nonstop10h 10mLufthansa
Deal found 6/11$644
This deal was found by Cheapflights users on 6/10. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/71:30 pmSTL - FRA
1 stop12h 25mDelta
Thu 10/1610:40 amFRA - STL
1 stop17h 09mDelta
Deal found 6/10$684
This Flysmarter deal was found by Cheapflights users on 6/11. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/17:11 pmSTL - FRA
2 stops19h 54mAir France
Fri 8/1511:00 amFRA - STL
1 stop12h 35mAir France
Deal found 6/11$777
This British Airways deal was found by Cheapflights users on 6/11. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/112:27 pmSTL - FRA
1 stop13h 18mBritish Airways
Fri 8/156:10 amFRA - STL
2 stops19h 20mBritish Airways
Deal found 6/11$847
This Orbitz deal was found by Cheapflights users on 6/12. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/201:30 pmSTL - FRA
2 stops18h 00mScandinavian Airlines
Sun 11/308:30 pmFRA - STL
2 stops34h 09mScandinavian Airlines
Deal found 6/12$880
This KLM deal was found by Cheapflights users on 6/11. 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.
Wed 7/910:30 amSTL - FRA
1 stop16h 20mKLM
Mon 7/2810:40 amFRA - STL
1 stop14h 25mKLM
Deal found 6/11$999

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 June 12, 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

Tue 10/21

12:50 pm-7:20 am

1 stop11h 30m

Frankfurt am Main

Tue 11/4

10:55 am-5:19 pm

1 stop13h 24m

$604

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Wed 10/29

9:42 am-8:50 am

2 stops17h 08m

Frankfurt am Main

Fri 11/7

10:55 am-9:12 pm

2 stops17h 17m

$609

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Wed 11/12

3:50 pm-7:30 am

Nonstop8h 40m

Frankfurt am Main

Thu 11/20

5:10 pm-2:20 pm

2 stops28h 10m

$633

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Wed 11/12

10:30 am-11:10 am

2 stops17h 40m

Frankfurt am Main

Thu 11/20

9:45 am-3:29 pm

2 stops36h 44m

$638

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Wed 10/29

11:49 am-7:25 am

1 stop13h 36m

Frankfurt am Main

Fri 11/7

10:45 am-1:55 pm

Nonstop10h 10m

$644

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Tue 10/7

1:30 pm-8:55 am

1 stop12h 25m

Frankfurt am Main

Thu 10/16

10:40 am-8:49 pm

1 stop17h 09m

$684

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Fri 8/1

7:11 pm-10:05 pm

2 stops19h 54m

Frankfurt am Main

Fri 8/15

11:00 am-4:35 pm

1 stop12h 35m

$777

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Fri 8/1

12:27 pm-8:45 am

1 stop13h 18m

Frankfurt am Main

Fri 8/15

6:10 am-6:30 pm

2 stops19h 20m

$847

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Thu 11/20

1:30 pm-2:30 pm

2 stops18h 00m

Frankfurt am Main

Sun 11/30

8:30 pm-11:39 pm

2 stops34h 09m

$880

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Wed 7/9

10:30 am-9:50 am

1 stop16h 20m

Frankfurt am Main

Mon 7/28

10:40 am-6:05 pm

1 stop14h 25m

$999

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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 June 9, 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 June 12, 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 June 12, 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
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Alaska Airlines
8.0
Very good
10,000 reviews
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Finnair
7.6
Good
1,290 reviews
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,463 reviews
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 $419. However, be on the lookout for offers from British Airways 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 $425. On average you can expect to pay $2,364. The most popular route, (Lambert-St Louis - Frankfurt am Main), can usually be booked for $604.

  • 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

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$576Average$954FlexibilityNo cancel feeOn-time71%
DeltaCheapest$610Average$1,182FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$629Average$946FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$776Average$1,113FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$818Average$1,270FlexibilityNo cancel feeOn-time76%
KLMCheapest$845Average$1,115FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$921Average$1,301FlexibilityNo cancel feeOn-time67%

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