$302+ 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 2/9. Fares are subject to change and may not be available on all flights or dates of travel.
STL — FRA
Mar 7 — Mar 141
1 adult, Economy
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Find cheap flights from St. Louis to Heidelberg with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Lambert-St Louis to Heidelberg are usually found in August or November, booked 3 days in advance, depart on a Tuesday or Monday and return on a Thursday
Cheap flight deals from St. Louis to Heidelberg
Cheapest
Best
Last-minute
One-way
Cheapest flights from St. Louis to HeidelbergExplore 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 February 5, 2026.
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 February 5, 2026.
This Condor deal was found by Cheapflights users on 2/2. 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 Condor is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1210:25 am
STL
- FRA
1 stop12h 20m
Multiple Airlines
Wed 8/2612:30 pm
FRA
- STL
1 stop14h 10m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$806
This Expedia deal was found by Cheapflights users on 2/3. 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 11/184:40 pm
STL
- FRA
2 stops14h 30m
Multiple Airlines
Sun 11/227:55 am
FRA
- STL
2 stops19h 54m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$833
This Expedia deal was found by Cheapflights users on 2/3. 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 10/147:38 am
STL
- FRA
2 stops19h 37m
Multiple Airlines
Sat 10/249:20 am
FRA
- STL
1 stop21h 11m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$851
This KAYAK deal was found by Cheapflights users on 2/4. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/233:42 pm
STL
- FRA
2 stops36h 08m
Scandinavian Airlines
Sun 11/18:30 pm
FRA
- STL
2 stops34h 09m
Scandinavian Airlines
Deal found 2/4![Scandinavian Airlines logo]()
$858
This KAYAK deal was found by Cheapflights users on 2/2. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/233:47 pm
STL
- FRA
2 stops35h 03m
Scandinavian Airlines
Wed 3/43:15 pm
FRA
- STL
2 stops36h 26m
Scandinavian Airlines
Deal found 2/2![Scandinavian Airlines logo]()
$860
This oojo deal was found by Cheapflights users on 2/4. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2211:44 am
STL
- FRA
2 stops19h 06m
British Airways
Tue 4/283:55 pm
FRA
- STL
1 stop34h 35m
British Airways
Deal found 2/4![British Airways logo]()
$866
This Travelocity deal was found by Cheapflights users on 2/3. 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.
Tue 8/118:35 am
STL
- FRA
2 stops18h 40m
Multiple Airlines
Thu 8/209:20 am
FRA
- STL
1 stop21h 35m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$867
This Mytrip deal was found by Cheapflights users on 2/4. 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.
Sun 5/32:20 pm
STL
- FRA
3 stops20h 45m
Multiple Airlines
Sat 5/98:15 pm
FRA
- STL
3 stops30h 50m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$871
This Air Canada deal was found by Cheapflights users on 2/4. 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.
Wed 4/2210:00 am
STL
- FRA
2 stops15h 00m
Multiple Airlines
Tue 4/289:10 pm
FRA
- STL
2 stops25h 14m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$872
This Priceline deal was found by Cheapflights users on 2/4. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/19:35 pm
STL
- FRA
1 stop13h 40m
Multiple Airlines
Tue 9/2911:30 am
FRA
- STL
2 stops18h 50m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$876
Best flights from St. Louis to HeidelbergDiscover carefully curated flight deals from St. Louis to Heidelberg that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 5, 2026.
Discover carefully curated flight deals from St. Louis to Heidelberg that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 5, 2026.
This oojo deal was found by Cheapflights users on 2/4. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2211:44 am
STL
- FRA
2 stops19h 06m
British Airways
Tue 4/283:55 pm
FRA
- STL
1 stop34h 35m
British Airways
Deal found 2/4![British Airways logo]()
$866
This Mytrip deal was found by Cheapflights users on 2/4. 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.
Sun 5/32:20 pm
STL
- FRA
3 stops20h 45m
Multiple Airlines
Sat 5/98:15 pm
FRA
- STL
3 stops30h 50m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$871
This oojo deal was found by Cheapflights users on 2/4. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/88:00 am
STL
- FRA
2 stops20h 05m
Aer Lingus
Wed 3/1810:45 am
FRA
- STL
2 stops19h 03m
Aer Lingus
Deal found 2/4![Aer Lingus logo]()
$902
This United Airlines deal was found by Cheapflights users on 2/2. 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 4/87:45 am
STL
- FRA
1 stop23h 20m
United Airlines
Wed 5/205:05 pm
FRA
- STL
1 stop33h 59m
United Airlines
Deal found 2/2![United Airlines logo]()
$1,004
This Cheapflightsfares deal was found by Cheapflights users on 2/3. 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 5/63:30 pm
STL
- FRA
Nonstop8h 55m
Lufthansa
Sun 5/171:20 pm
FRA
- STL
1 stop17h 37m
Lufthansa
Deal found 2/3![Lufthansa logo]()
$1,005
This Delta deal was found by Cheapflights users on 2/2. 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 5/61:03 pm
STL
- FRA
1 stop12h 52m
Delta
Sun 5/177:00 am
FRA
- STL
2 stops16h 49m
Delta
Deal found 2/2![Delta logo]()
$1,031
This KLM deal was found by Cheapflights users on 2/4. 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 5/611:43 am
STL
- FRA
1 stop14h 12m
KLM
Sun 5/1710:40 am
FRA
- STL
1 stop17h 44m
KLM
Deal found 2/4![KLM logo]()
$1,031
This oojo deal was found by Cheapflights users on 2/5. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/232:19 pm
STL
- FRA
2 stops36h 46m
Aer Lingus
Wed 3/410:45 am
FRA
- STL
2 stops20h 03m
Aer Lingus
Deal found 2/5![Aer Lingus logo]()
$907
This Cheapflightsfares deal was found by Cheapflights users on 2/4. 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 3/187:00 pm
STL
- FRA
1 stop13h 00m
Lufthansa
Wed 4/2210:40 am
FRA
- STL
Nonstop9h 45m
Lufthansa
Deal found 2/4![Lufthansa logo]()
$1,085
This United Airlines deal was found by Cheapflights users on 2/4. 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 3/81:14 pm
STL
- FRA
1 stop11h 21m
United Airlines
Wed 3/185:10 pm
FRA
- STL
2 stops27h 32m
United Airlines
Deal found 2/4![United Airlines logo]()
$1,106
This United Airlines deal was found by Cheapflights users on 2/3. 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.
Sat 3/282:50 pm
STL
- FRA
1 stop35h 30m
United Airlines
Tue 4/75:05 pm
FRA
- STL
1 stop29h 19m
United Airlines
Deal found 2/3![United Airlines logo]()
$1,150
Last-minute flights from St. Louis to HeidelbergDiscover last-minute flight deals from St. Louis to Heidelberg. Data last updated February 5, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Heidelberg. Data last updated February 5, 2026 and is based on user searches.
This Ovago deal was found by Cheapflights users on 2/3. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/179:23 am
STL
- FRA
2 stops41h 42m
Aer Lingus
Tue 2/2410:45 am
FRA
- STL
2 stops20h 03m
Aer Lingus
Deal found 2/3![Aer Lingus logo]()
$932
This KAYAK deal was found by Cheapflights users on 2/2. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/233:47 pm
STL
- FRA
2 stops35h 03m
Scandinavian Airlines
Wed 3/43:15 pm
FRA
- STL
2 stops36h 26m
Scandinavian Airlines
Deal found 2/2![Scandinavian Airlines logo]()
$860
This KAYAK deal was found by Cheapflights users on 2/4. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/232:19 pm
STL
- FRA
2 stops36h 46m
Aer Lingus
Wed 3/410:45 am
FRA
- STL
2 stops20h 03m
Aer Lingus
Deal found 2/4![Aer Lingus logo]()
$938
This KAYAK deal was found by Cheapflights users on 2/2. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/279:37 am
STL
- FRA
2 stops41h 28m
Aer Lingus
Tue 3/1010:45 am
FRA
- STL
2 stops19h 03m
Aer Lingus
Deal found 2/2![Aer Lingus logo]()
$951
This oojo deal was found by Cheapflights users on 2/4. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/88:00 am
STL
- FRA
2 stops20h 05m
Aer Lingus
Wed 3/1810:45 am
FRA
- STL
2 stops19h 03m
Aer Lingus
Deal found 2/4![Aer Lingus logo]()
$902
This oojo deal was found by Cheapflights users on 2/4. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/189:37 am
STL
- FRA
2 stops18h 28m
Aer Lingus
Wed 4/2210:55 am
FRA
- STL
2 stops19h 53m
Aer Lingus
Deal found 2/4![Aer Lingus logo]()
$903
This Cheapflightsfares deal was found by Cheapflights users on 2/3. 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 3/184:50 pm
STL
- FRA
Nonstop8h 40m
Lufthansa
Wed 4/2210:40 am
FRA
- STL
Nonstop9h 45m
Lufthansa
Deal found 2/3![Lufthansa logo]()
$1,032
This oojo deal was found by Cheapflights users on 2/2. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/196:00 am
STL
- FRA
2 stops22h 05m
Aer Lingus
Thu 3/268:00 pm
FRA
- STL
2 stops32h 52m
Aer Lingus
Deal found 2/2![Aer Lingus logo]()
$1,033
This oojo deal was found by Cheapflights users on 2/2. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/2912:05 pm
STL
- FRA
2 stops39h 10m
Aer Lingus
Sun 4/1210:55 am
FRA
- STL
2 stops19h 53m
Aer Lingus
Deal found 2/2![Aer Lingus logo]()
$898
One-way flights from St. Louis to HeidelbergSearch for one-way flight options from St. Louis to Heidelberg. Find affordable one-way fares based on user searches. Data last updated February 5, 2026.
Search for one-way flight options from St. Louis to Heidelberg. Find affordable one-way fares based on user searches. Data last updated February 5, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Mon 2/910:16 am
STL
- FRA
3 stops40h 49m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$302
This Ovago deal was found by Cheapflights users on 2/3. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/29:37 am
STL
- FRA
2 stops17h 28m
Aer Lingus
Deal found 2/3![Aer Lingus logo]()
$358
This KAYAK deal was found by Cheapflights users on 2/2. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1412:11 pm
STL
- FRA
2 stops24h 49m
Aer Lingus
Deal found 2/2![Aer Lingus logo]()
$367
This KAYAK deal was found by Cheapflights users on 2/2. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/98:31 am
STL
- FRA
2 stops42h 34m
Aer Lingus
Deal found 2/2![Aer Lingus logo]()
$369
This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
Mon 3/28:22 pm
STL
- FRA
3 stops39h 58m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$377
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Tue 4/144:55 pm
STL
- FRA
3 stops40h 25m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$413
This TravelUp deal was found by Cheapflights users on 2/2. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1412:15 pm
STL
- FRA
1 stop16h 55m
Lufthansa
Deal found 2/2![Lufthansa logo]()
$658
This oojo deal was found by Cheapflights users on 2/3. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/211:46 am
STL
- FRA
1 stop12h 29m
British Airways
Deal found 2/3![British Airways logo]()
$797
Find 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 February 5, 2026.
Round-trip from | $860 (KAYAK) |
|---|---|
One-way from | $302 (Kiwi.com) |
Popular in | June |
Cheapest in | August |
Average price | $1,349 |
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 February 5, 2026.
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 4/22
11:44 am-1:50 pm
2 stops19h 06m
Frankfurt am Main
Tue 4/28
3:55 pm-7:30 pm
1 stop34h 35m
$866
St. LouisFrankfurt am Main
STL - FRA
STLFRA
Lambert-St Louis
Sun 5/3
2:20 pm-6:05 pm
3 stops20h 45m
Frankfurt am Main
Sat 5/9
8:15 pm-8:05 pm
3 stops30h 50m
$871
St. LouisFrankfurt am Main
STL - FRA
STLFRA
Lambert-St Louis
Sun 3/8
8:00 am-10:05 am
2 stops20h 05m
Frankfurt am Main
Wed 3/18
10:45 am-11:48 pm
2 stops19h 03m
$902
St. LouisFrankfurt am Main
STL - FRA
STLFRA
Lambert-St Louis
Mon 2/23
2:19 pm-10:05 am
2 stops36h 46m
Frankfurt am Main
Wed 3/4
10:45 am-11:48 pm
2 stops20h 03m
$907
St. LouisFrankfurt am Main
STL - FRA
STLFRA
Lambert-St Louis
Wed 4/8
7:45 am-2:05 pm
1 stop23h 20m
Frankfurt am Main
Wed 5/20
5:05 pm-8:04 pm
1 stop33h 59m
$1,004
St. LouisFrankfurt am Main
STL - FRA
STLFRA
Lambert-St Louis
Wed 5/6
3:30 pm-7:25 am
Nonstop8h 55m
Frankfurt am Main
Sun 5/17
1:20 pm-11:57 pm
1 stop17h 37m
$1,005
St. LouisFrankfurt am Main
STL - FRA
STLFRA
Lambert-St Louis
Wed 5/6
1:03 pm-8:55 am
1 stop12h 52m
Frankfurt am Main
Sun 5/17
7:00 am-4:49 pm
2 stops16h 49m
$1,031
St. LouisFrankfurt am Main
STL - FRA
STLFRA
Lambert-St Louis
Wed 5/6
11:43 am-8:55 am
1 stop14h 12m
Frankfurt am Main
Sun 5/17
10:40 am-9:24 pm
1 stop17h 44m
$1,031
St. LouisFrankfurt am Main
STL - FRA
STLFRA
Lambert-St Louis
Wed 3/18
7:00 pm-2:00 pm
1 stop13h 00m
Frankfurt am Main
Wed 4/22
10:40 am-1:25 pm
Nonstop9h 45m
$1,085
St. LouisFrankfurt am Main
STL - FRA
STLFRA
Lambert-St Louis
Sun 3/8
1:14 pm-6:35 am
1 stop11h 21m
Frankfurt am Main
Wed 3/18
5:10 pm-2:42 pm
2 stops27h 32m
$1,106
Showing 1-10 of 19 results
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.
STL-FRA
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
STL-HE1
STL-FRA
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 January 30, 2026.
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 $648). 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 February 5, 2026.
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.
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 February 5, 2026.
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.
Boarding
7.7
Entertainment
7.1
Comfort
7.3
Crew
8.1
Overall
7.4
Food
6.6
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Boarding
7.7
Entertainment
7.1
Comfort
7.3
Crew
8.1
Overall
7.4
Food
6.6
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Boarding
7.7
Entertainment
7.1
Comfort
7.3
Crew
8.1
Overall
7.4
Food
6.6
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Boarding
7.7
Entertainment
7.1
Comfort
7.3
Crew
8.1
Overall
7.4
Food
6.6
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Boarding
7.7
Entertainment
7.1
Comfort
7.3
Crew
8.1
Overall
7.4
Food
6.6
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Boarding
7.7
Entertainment
7.1
Comfort
7.3
Crew
8.1
Overall
7.4
Food
6.6
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
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.
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St. Louis and Heidelberg flights
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Other flights from St. Louis
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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 February 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$390 | Average$946 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$585 | Average$892 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$610 | Average$919 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$739 | Average$1,134 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$816 | Average$1,333 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$841 | Average$1,115 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$921 | Average$1,202 | FlexibilityNo cancel fee | On-time67% |