$246+ Cheap flights from St. Louis to Harrisburg (STL - MDT)
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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MDT
Aug 27 — Sep 31
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Harrisburg 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
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Best
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Cheapest flights from St. Louis to HarrisburgExplore the most affordable flight options available from St. Louis to Harrisburg. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2026.
Explore the most affordable flight options available from St. Louis to Harrisburg. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2026.
This American Airlines deal was found by Cheapflights users on 7/27. 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.
Wed 8/265:42 pm
STL
- MDT
1 stop4h 21m
American Airlines
Wed 9/211:00 am
MDT
- STL
1 stop7h 01m
American Airlines
Deal found 7/27![American Airlines logo]()
$301
This American Airlines deal was found by Cheapflights users on 7/28. 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 8/186:00 am
STL
- MDT
1 stop6h 58m
American Airlines
Sat 8/297:30 pm
MDT
- STL
1 stop5h 28m
American Airlines
Deal found 7/28![American Airlines logo]()
$310
This United Airlines deal was found by Cheapflights users on 7/24. 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.
Thu 9/37:25 am
STL
- MDT
1 stop5h 07m
United Airlines
Sun 9/66:30 am
MDT
- STL
1 stop6h 32m
United Airlines
Deal found 7/24![United Airlines logo]()
$319
This Delta deal was found by Cheapflights users on 7/24. 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.
Tue 12/225:45 pm
STL
- MDT
1 stop4h 01m
Delta
Fri 12/2512:30 pm
MDT
- STL
1 stop5h 20m
Delta
Deal found 7/24![Delta logo]()
$320
This Delta deal was found by Cheapflights users on 7/24. 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.
Fri 12/189:00 am
STL
- MDT
1 stop7h 08m
Delta
Mon 12/216:10 am
MDT
- STL
1 stop4h 26m
Delta
Deal found 7/24![Delta logo]()
$329
This Delta deal was found by Cheapflights users on 7/26. 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.
Thu 8/136:00 am
STL
- MDT
1 stop7h 13m
Delta
Sun 8/166:00 am
MDT
- STL
1 stop4h 39m
Delta
Deal found 7/26![Delta logo]()
$334
This United Airlines deal was found by Cheapflights users on 7/27. 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.
Thu 8/139:30 am
STL
- MDT
1 stop6h 22m
United Airlines
Sun 8/165:54 pm
MDT
- STL
1 stop5h 07m
United Airlines
Deal found 7/27![United Airlines logo]()
$349
This Delta deal was found by Cheapflights users on 7/24. 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.
Tue 12/225:45 pm
STL
- MDT
1 stop4h 01m
Delta
Sat 12/2612:30 pm
MDT
- STL
1 stop5h 20m
Delta
Deal found 7/24![Delta logo]()
$350
This Delta deal was found by Cheapflights users on 7/24. 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.
Fri 12/189:00 am
STL
- MDT
1 stop7h 08m
Delta
Wed 12/236:10 am
MDT
- STL
1 stop4h 26m
Delta
Deal found 7/24![Delta logo]()
$359
This United Airlines deal was found by Cheapflights users on 7/23. 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 8/296:00 am
STL
- MDT
1 stop6h 32m
United Airlines
Tue 9/16:30 am
MDT
- STL
1 stop6h 32m
United Airlines
Deal found 7/23![United Airlines logo]()
$371
This Delta deal was found by Cheapflights users on 7/27. 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.
Fri 9/184:59 pm
STL
- MDT
1 stop5h 41m
Delta
Mon 9/216:09 pm
MDT
- STL
1 stop6h 33m
Delta
Deal found 7/27![Delta logo]()
$379
Best flights from St. Louis to HarrisburgDiscover carefully curated flight deals from St. Louis to Harrisburg that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 28, 2026.
Discover carefully curated flight deals from St. Louis to Harrisburg that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 28, 2026.
This American Airlines deal was found by Cheapflights users on 7/25. 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.
Sat 8/151:25 pm
STL
- MDT
1 stop4h 25m
American Airlines
Sat 8/221:25 pm
MDT
- STL
1 stop4h 18m
American Airlines
Deal found 7/25![American Airlines logo]()
$319
This United Airlines deal was found by Cheapflights users on 7/27. 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 8/287:25 am
STL
- MDT
1 stop5h 07m
United Airlines
Sun 8/3010:40 am
MDT
- STL
1 stop5h 58m
United Airlines
Deal found 7/27![United Airlines logo]()
$319
This Delta deal was found by Cheapflights users on 7/26. 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.
Thu 8/136:00 am
STL
- MDT
1 stop7h 13m
Delta
Sun 8/166:00 am
MDT
- STL
1 stop4h 39m
Delta
Deal found 7/26![Delta logo]()
$334
This United Airlines deal was found by Cheapflights users on 7/27. 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 8/296:00 am
STL
- MDT
1 stop6h 32m
United Airlines
Tue 9/16:30 am
MDT
- STL
1 stop6h 32m
United Airlines
Deal found 7/27![United Airlines logo]()
$381
This United Airlines deal was found by Cheapflights users on 7/27. 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.
Tue 8/118:40 am
STL
- MDT
1 stop4h 23m
United Airlines
Sat 8/156:30 am
MDT
- STL
1 stop4h 42m
United Airlines
Deal found 7/27![United Airlines logo]()
$429
This Delta deal was found by Cheapflights users on 7/24. 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 12/237:20 am
STL
- MDT
2 stops14h 26m
Delta
Fri 12/256:25 pm
MDT
- STL
1 stop6h 14m
Delta
Deal found 7/24![Delta logo]()
$503
This Delta deal was found by Cheapflights users on 7/24. 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.
Mon 12/215:45 pm
STL
- MDT
1 stop4h 01m
Delta
Thu 12/246:25 pm
MDT
- STL
2 stops16h 11m
Delta
Deal found 7/24![Delta logo]()
$514
This United Airlines deal was found by Cheapflights users on 7/28. 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 8/128:40 am
STL
- MDT
1 stop4h 23m
United Airlines
Sun 8/166:30 am
MDT
- STL
1 stop4h 42m
United Airlines
Deal found 7/28![United Airlines logo]()
$494
This Delta deal was found by Cheapflights users on 7/24. 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.
Tue 12/226:30 am
STL
- MDT
2 stops15h 16m
Delta
Sat 12/2612:30 pm
MDT
- STL
1 stop5h 20m
Delta
Deal found 7/24![Delta logo]()
$533
This United Airlines deal was found by Cheapflights users on 7/25. 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 8/128:00 am
STL
- MDT
1 stop4h 32m
United Airlines
Fri 8/145:54 pm
MDT
- STL
1 stop22h 37m
United Airlines
Deal found 7/25![United Airlines logo]()
$502
This United Airlines deal was found by Cheapflights users on 7/25. 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 9/58:00 am
STL
- MDT
1 stop4h 32m
United Airlines
Mon 9/76:15 am
MDT
- STL
2 stops10h 23m
United Airlines
Deal found 7/25![United Airlines logo]()
$525
Last-minute flights from St. Louis to HarrisburgDiscover last-minute flight deals from St. Louis to Harrisburg. Data last updated July 28, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Harrisburg. Data last updated July 28, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 7/26. 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.
Tue 7/286:30 am
STL
- MDT
1 stop4h 33m
Delta
Tue 8/46:00 am
MDT
- STL
1 stop6h 46m
Delta
Deal found 7/26![Delta logo]()
$407
This Delta deal was found by Cheapflights users on 7/26. 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.
Fri 7/316:04 pm
STL
- MDT
1 stop4h 05m
Delta
Tue 8/46:00 am
MDT
- STL
1 stop6h 46m
Delta
Deal found 7/26![Delta logo]()
$423
This American Airlines deal was found by Cheapflights users on 7/25. 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 7/311:27 pm
STL
- MDT
1 stop4h 38m
American Airlines
Sun 8/27:38 pm
MDT
- STL
1 stop4h 54m
American Airlines
Deal found 7/25![American Airlines logo]()
$424
This United Airlines deal was found by Cheapflights users on 7/27. 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.
Thu 8/610:20 am
STL
- MDT
1 stop5h 36m
United Airlines
Thu 8/135:54 pm
MDT
- STL
1 stop5h 06m
United Airlines
Deal found 7/27![United Airlines logo]()
$379
This American Airlines deal was found by Cheapflights users on 7/28. 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.
Thu 8/66:00 am
STL
- MDT
1 stop5h 45m
American Airlines
Sat 8/81:25 pm
MDT
- STL
1 stop4h 10m
American Airlines
Deal found 7/28![American Airlines logo]()
$408
This Delta deal was found by Cheapflights users on 7/26. 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.
Thu 8/136:00 am
STL
- MDT
1 stop7h 13m
Delta
Sun 8/166:00 am
MDT
- STL
1 stop4h 39m
Delta
Deal found 7/26![Delta logo]()
$334
This United Airlines deal was found by Cheapflights users on 7/27. 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.
Thu 8/139:30 am
STL
- MDT
1 stop6h 22m
United Airlines
Sun 8/165:54 pm
MDT
- STL
1 stop5h 07m
United Airlines
Deal found 7/27![United Airlines logo]()
$349
This American Airlines deal was found by Cheapflights users on 7/28. 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 8/186:00 am
STL
- MDT
1 stop6h 58m
American Airlines
Sat 8/297:30 pm
MDT
- STL
1 stop5h 28m
American Airlines
Deal found 7/28![American Airlines logo]()
$310
This American Airlines deal was found by Cheapflights users on 7/27. 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.
Wed 8/265:42 pm
STL
- MDT
1 stop4h 21m
American Airlines
Wed 9/211:00 am
MDT
- STL
1 stop7h 01m
American Airlines
Deal found 7/27![American Airlines logo]()
$301
This United Airlines deal was found by Cheapflights users on 7/27. 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 8/287:25 am
STL
- MDT
1 stop5h 07m
United Airlines
Sun 8/3010:40 am
MDT
- STL
1 stop5h 58m
United Airlines
Deal found 7/27![United Airlines logo]()
$319
This United Airlines deal was found by Cheapflights users on 7/23. 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 8/296:00 am
STL
- MDT
1 stop6h 32m
United Airlines
Tue 9/16:30 am
MDT
- STL
1 stop6h 32m
United Airlines
Deal found 7/23![United Airlines logo]()
$371
One-way flights from St. Louis to HarrisburgSearch for one-way flight options from St. Louis to Harrisburg. Find affordable one-way fares based on user searches. Data last updated July 28, 2026.
Search for one-way flight options from St. Louis to Harrisburg. Find affordable one-way fares based on user searches. Data last updated July 28, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/28. 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.
Fri 9/46:17 pm
STL
- MDT
3 stops43h 56m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$246
This Kiwi.com deal was found by Cheapflights users on 7/25. 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.
Sun 8/22:00 pm
STL
- MDT
2 stops19h 47m
Multiple Airlines
Deal found 7/25![Multiple Airlines logo]()
$249
This Delta deal was found by Cheapflights users on 7/28. 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.
Sat 8/226:09 pm
STL
- MDT
1 stop4h 12m
Delta
Deal found 7/28![Delta logo]()
$274
This KAYAK deal was found by Cheapflights users on 7/27. 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.
Wed 8/511:22 am
STL
- MDT
1 stop6h 47m
American Airlines
Deal found 7/27![American Airlines logo]()
$278
This Kiwi.com deal was found by Cheapflights users on 7/23. 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.
Sat 8/225:02 pm
STL
- MDT
2 stops24h 23m
Multiple Airlines
Deal found 7/23![Multiple Airlines logo]()
$308
This Kiwi.com deal was found by Cheapflights users on 7/28. 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.
Fri 8/214:23 pm
STL
- MDT
2 stops45h 46m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$311
This KAYAK deal was found by Cheapflights users on 7/28. 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.
Thu 8/63:25 pm
STL
- MDT
1 stop7h 03m
American Airlines
Deal found 7/28![American Airlines logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 7/25. 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 8/54:57 pm
STL
- MDT
2 stops23h 11m
Multiple Airlines
Deal found 7/25![Multiple Airlines logo]()
$357
Find flight deals from St. Louis to Harrisburg
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Harrisburg (MDT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 28, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $301 (American Airlines) |
One-way from | $246 (Kiwi.com) |
Popular in | May |
Cheapest in | April |
Average price | $396 |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Harrisburg 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 28, 2026.
Use the filters below to find and compare flights from St. Louis to Harrisburg that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
St. LouisHarrisburg
STL - MDT
STLMDT
Lambert-St Louis
Sat 8/15
1:25 pm-6:50 pm
1 stop4h 25m
Harrisburg
Sat 8/22
1:25 pm-4:43 pm
1 stop4h 18m
$319
St. LouisHarrisburg
STL - MDT
STLMDT
Lambert-St Louis
Fri 8/28
7:25 am-1:32 pm
1 stop5h 07m
Harrisburg
Sun 8/30
10:40 am-3:38 pm
1 stop5h 58m
$319
St. LouisHarrisburg
STL - MDT
STLMDT
Lambert-St Louis
Thu 8/13
6:00 am-2:13 pm
1 stop7h 13m
Harrisburg
Sun 8/16
6:00 am-9:39 am
1 stop4h 39m
$334
St. LouisHarrisburg
STL - MDT
STLMDT
Lambert-St Louis
Sat 8/29
6:00 am-1:32 pm
1 stop6h 32m
Harrisburg
Tue 9/1
6:30 am-12:02 pm
1 stop6h 32m
$381
St. LouisHarrisburg
STL - MDT
STLMDT
Lambert-St Louis
Tue 8/11
8:40 am-2:03 pm
1 stop4h 23m
Harrisburg
Sat 8/15
6:30 am-10:12 am
1 stop4h 42m
$429
St. LouisHarrisburg
STL - MDT
STLMDT
Lambert-St Louis
Wed 8/12
8:40 am-2:03 pm
1 stop4h 23m
Harrisburg
Sun 8/16
6:30 am-10:12 am
1 stop4h 42m
$494
St. LouisHarrisburg
STL - MDT
STLMDT
Lambert-St Louis
Wed 8/12
8:00 am-1:32 pm
1 stop4h 32m
Harrisburg
Fri 8/14
5:54 pm-3:31 pm
1 stop22h 37m
$502
St. LouisHarrisburg
STL - MDT
STLMDT
Lambert-St Louis
Wed 12/23
7:20 am-10:46 pm
2 stops14h 26m
Harrisburg
Fri 12/25
6:25 pm-11:39 pm
1 stop6h 14m
$503
St. LouisHarrisburg
STL - MDT
STLMDT
Lambert-St Louis
Mon 12/21
5:45 pm-10:46 pm
1 stop4h 01m
Harrisburg
Thu 12/24
6:25 pm-9:36 am
2 stops16h 11m
$514
St. LouisHarrisburg
STL - MDT
STLMDT
Lambert-St Louis
Sat 9/5
8:00 am-1:32 pm
1 stop4h 32m
Harrisburg
Mon 9/7
6:15 am-3:38 pm
2 stops10h 23m
$525
Showing 1-10 of 22 resultsSorted by cheapest first
Compare providers for flights from St. Louis to Harrisburg
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Harrisburg in July.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on St. Louis-Harrisburg flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Harrisburg flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Harrisburg flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Harrisburg flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Harrisburg flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from St. Louis to Harrisburg
Have a flexible travel schedule? Discover the best time to fly to Harrisburg from St. Louis with our price prediction graph.
STL-MDT
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 Harrisburg
Prices
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What is the cheapest month to book a flight from St. Louis to Harrisburg?
Currently, April is the cheapest month in which you can book a flight from St. Louis to Harrisburg (average of $270). Flying from St. Louis to Harrisburg in May is currently the most expensive (average of $452). 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.
How much does it cost to fly round-trip from St. Louis to Harrisburg?
Airfare is below average for this route at the moment.
St. Louis to Harrisburg flights typically cost between $338 and $442 in August.The cheapest round-trip price found within the last 5 days was $301 on American Airlines (Aug 26-Sep 2).
What’s the top layover airport for flights from St. Louis to Harrisburg?
Share of 1-stop round-trip flights from St. Louis to Harrisburg chosen by Cheapflights users in the past 12 months, using the same layover each way.
Detroit (DTW) – chosen by Cheapflights users on 67% of 1-stop itineraries from St. Louis to Harrisburg on Cheapflights.
What’s the cheapest layover airport for flights from St. Louis to Harrisburg?
Average round-trip fare for 1-stop flights from St. Louis to Harrisburg, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Detroit (DTW) is the most affordable 1-stop option, with an average round-trip price of $265.
What’s the fastest layover option from St. Louis to Harrisburg?
Shortest average travel time for 1-stop one-way flights from St. Louis to Harrisburg, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Detroit (DTW) have the shortest average one-way travel time for 1-stop routes: 4h 17m.
Which airport typically offers the quickest layover for flights from St. Louis to Harrisburg?
Average layover duration for 1-stop one-way flights from St. Louis to Harrisburg, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Detroit (DTW) offer the fastest connection on this route, with an average layover time of 1h 12m.
Reviews of airlines servicing Harrisburg
Get insights into the airlines that provide service to Harrisburg. 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 Harrisburg. Reviews last updated July 28, 2026.
See what other customers who have flown with Delta,United Airlines, andAmerican Airlines from St. Louis to Harrisburg have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.5
Overall
7.8
Food
7.2
Boarding
8.1
Comfort
7.8
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Overall
7.8
Food
7.2
Boarding
8.1
Comfort
7.8
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Overall
7.8
Food
7.2
Boarding
8.1
Comfort
7.8
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Overall
7.8
Food
7.2
Boarding
8.1
Comfort
7.8
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Harrisburg. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Harrisburg?
Book flights to Harrisburg if you plan to visit one of these locationsHershey
Mechanicsburg
Camp Hill
Carlisle
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St. Louis and Harrisburg flights
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Top 3 airlines flying from St. Louis to Harrisburg
Discover the top 3 airlines that operate flights from St. Louis to Harrisburg. 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 28, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$248 | Average$322 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$248 | Average$354 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$260 | Average$359 | FlexibilityNo cancel fee | On-time69% |