$146+ 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 5/14. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MDT
May 17 — May 241
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Harrisburg with Cheapflights
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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
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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 April 17, 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 April 17, 2026.
This Delta deal was found by Cheapflights users on 4/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/237:20 am
STL
- MDT
1 stop5h 49m
Delta
Wed 9/302:56 pm
MDT
- STL
1 stop6h 54m
Delta
Deal found 4/14![Delta logo]()
$291
This American Airlines deal was found by Cheapflights users on 4/13. 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 6/46:00 am
STL
- MDT
1 stop4h 12m
American Airlines
Sat 6/67:40 pm
MDT
- STL
1 stop5h 19m
American Airlines
Deal found 4/13![American Airlines logo]()
$310
This American Airlines deal was found by Cheapflights users on 4/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/146:29 am
STL
- MDT
1 stop6h 49m
American Airlines
Sun 5/176:43 pm
MDT
- STL
1 stop6h 13m
American Airlines
Deal found 4/14![American Airlines logo]()
$329
This deal was found by Cheapflights users on 4/13. 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.
Wed 5/135:15 pm
STL
- MDT
1 stop5h 36m
Delta
Tue 5/196:33 pm
MDT
- STL
1 stop6h 26m
Delta
Deal found 4/13![Delta logo]()
$335
This United Airlines deal was found by Cheapflights users on 4/13. 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 4/289:10 am
STL
- MDT
1 stop6h 41m
United Airlines
Sat 5/25:54 pm
MDT
- STL
1 stop4h 19m
United Airlines
Deal found 4/13![United Airlines logo]()
$339
This United Airlines deal was found by Cheapflights users on 4/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/237:45 am
STL
- MDT
1 stop4h 45m
United Airlines
Sun 4/265:52 pm
MDT
- STL
1 stop6h 19m
United Airlines
Deal found 4/14![United Airlines logo]()
$349
This deal was found by Cheapflights users on 4/13. 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 5/125:15 pm
STL
- MDT
1 stop5h 36m
Delta
Mon 5/186:33 pm
MDT
- STL
1 stop6h 26m
Delta
Deal found 4/13![Delta logo]()
$354
This Kiwi.com deal was found by Cheapflights users on 4/13. 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 6/224:17 pm
STL
- MDT
1 stop18h 12m
Multiple Airlines
Thu 6/258:50 pm
MDT
- STL
1 stop28h 19m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$365
This United Airlines deal was found by Cheapflights users on 4/12. 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.
Sat 8/299:16 am
STL
- MDT
1 stop6h 35m
United Airlines
Wed 9/25:53 pm
MDT
- STL
1 stop4h 29m
United Airlines
Deal found 4/12![United Airlines logo]()
$371
This American Airlines deal was found by Cheapflights users on 4/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/156:54 pm
STL
- MDT
1 stop4h 37m
American Airlines
Sun 5/176:43 pm
MDT
- STL
1 stop6h 13m
American Airlines
Deal found 4/14![American Airlines logo]()
$376
This United Airlines deal was found by Cheapflights users on 4/12. 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.
Fri 7/175:33 pm
STL
- MDT
1 stop6h 12m
United Airlines
Fri 7/248:50 pm
MDT
- STL
1 stop4h 44m
United Airlines
Deal found 4/12![United Airlines logo]()
$395
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 April 17, 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 April 17, 2026.
This American Airlines deal was found by Cheapflights users on 4/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/165:21 pm
STL
- MDT
1 stop5h 31m
American Airlines
Mon 5/186:43 pm
MDT
- STL
1 stop6h 13m
American Airlines
Deal found 4/12![American Airlines logo]()
$310
This United Airlines deal was found by Cheapflights users on 4/13. 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 4/289:10 am
STL
- MDT
1 stop6h 41m
United Airlines
Sat 5/25:54 pm
MDT
- STL
1 stop4h 19m
United Airlines
Deal found 4/13![United Airlines logo]()
$339
This Delta deal was found by Cheapflights users on 4/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/116:30 am
STL
- MDT
1 stop4h 01m
Delta
Sun 7/126:00 am
MDT
- STL
1 stop4h 31m
Delta
Deal found 4/15![Delta logo]()
$365
This Delta deal was found by Cheapflights users on 4/13. 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 6/246:30 am
STL
- MDT
1 stop4h 12m
Delta
Sun 7/126:00 am
MDT
- STL
1 stop4h 31m
Delta
Deal found 4/13![Delta logo]()
$405
This United Airlines deal was found by Cheapflights users on 4/13. 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 6/251:13 pm
STL
- MDT
1 stop6h 48m
United Airlines
Sun 7/126:30 am
MDT
- STL
1 stop6h 41m
United Airlines
Deal found 4/13![United Airlines logo]()
$409
This Delta deal was found by Cheapflights users on 4/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/106:00 am
STL
- MDT
1 stop4h 10m
Delta
Sun 7/126:00 am
MDT
- STL
1 stop4h 31m
Delta
Deal found 4/14![Delta logo]()
$409
This United Airlines deal was found by Cheapflights users on 4/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/195:41 pm
STL
- MDT
1 stop5h 49m
United Airlines
Sun 6/216:15 am
MDT
- STL
2 stops10h 31m
United Airlines
Deal found 4/16![United Airlines logo]()
$640
This Delta deal was found by Cheapflights users on 4/13. 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 4/275:59 pm
STL
- MDT
1 stop4h 04m
Delta
Thu 4/306:19 pm
MDT
- STL
1 stop6h 17m
Delta
Deal found 4/13![Delta logo]()
$649
This United Airlines deal was found by Cheapflights users on 4/13. 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.
Mon 7/69:23 am
STL
- MDT
2 stops8h 21m
United Airlines
Thu 7/95:55 pm
MDT
- STL
1 stop4h 31m
United Airlines
Deal found 4/13![United Airlines logo]()
$791
This United Airlines deal was found by Cheapflights users on 4/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/101:13 pm
STL
- MDT
2 stops9h 17m
United Airlines
Sun 7/126:30 am
MDT
- STL
1 stop6h 41m
United Airlines
Deal found 4/14![United Airlines logo]()
$807
This United Airlines deal was found by Cheapflights users on 4/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/13:20 pm
STL
- MDT
1 stop4h 59m
United Airlines
Tue 5/510:40 am
MDT
- STL
2 stops6h 59m
United Airlines
Deal found 4/16![United Airlines logo]()
$890
Last-minute flights from St. Louis to HarrisburgDiscover last-minute flight deals from St. Louis to Harrisburg. Data last updated April 17, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Harrisburg. Data last updated April 17, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 4/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/237:45 am
STL
- MDT
1 stop4h 45m
United Airlines
Sun 4/265:52 pm
MDT
- STL
1 stop6h 19m
United Airlines
Deal found 4/14![United Airlines logo]()
$349
This United Airlines deal was found by Cheapflights users on 4/13. 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 4/289:10 am
STL
- MDT
1 stop6h 41m
United Airlines
Sat 5/25:54 pm
MDT
- STL
1 stop4h 19m
United Airlines
Deal found 4/13![United Airlines logo]()
$339
This deal was found by Cheapflights users on 4/13. 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.
Mon 5/116:54 pm
STL
- MDT
1 stop4h 37m
American Airlines
Wed 5/203:01 pm
MDT
- STL
1 stop5h 16m
American Airlines
Deal found 4/13![American Airlines logo]()
$433
This deal was found by Cheapflights users on 4/13. 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 5/125:15 pm
STL
- MDT
1 stop5h 36m
Delta
Mon 5/186:33 pm
MDT
- STL
1 stop6h 26m
Delta
Deal found 4/13![Delta logo]()
$354
This deal was found by Cheapflights users on 4/13. 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 5/125:15 pm
STL
- MDT
1 stop5h 36m
Delta
Tue 5/195:00 pm
MDT
- STL
1 stop5h 09m
Delta
Deal found 4/13![Delta logo]()
$431
This deal was found by Cheapflights users on 4/13. 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.
Wed 5/135:15 pm
STL
- MDT
1 stop5h 36m
Delta
Tue 5/196:33 pm
MDT
- STL
1 stop6h 26m
Delta
Deal found 4/13![Delta logo]()
$335
This deal was found by Cheapflights users on 4/13. 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.
Wed 5/135:21 pm
STL
- MDT
1 stop5h 31m
American Airlines
Mon 5/184:36 pm
MDT
- STL
1 stop6h 43m
American Airlines
Deal found 4/13![American Airlines logo]()
$459
This American Airlines deal was found by Cheapflights users on 4/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/146:29 am
STL
- MDT
1 stop6h 49m
American Airlines
Sun 5/176:43 pm
MDT
- STL
1 stop6h 13m
American Airlines
Deal found 4/14![American Airlines logo]()
$329
This American Airlines deal was found by Cheapflights users on 4/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/156:54 pm
STL
- MDT
1 stop4h 37m
American Airlines
Sun 5/176:43 pm
MDT
- STL
1 stop6h 13m
American Airlines
Deal found 4/14![American Airlines logo]()
$376
This United Airlines deal was found by Cheapflights users on 4/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/231:13 pm
STL
- MDT
1 stop5h 35m
United Airlines
Mon 5/257:59 pm
MDT
- STL
2 stops17h 12m
United Airlines
Deal found 4/14![United Airlines logo]()
$443
This United Airlines deal was found by Cheapflights users on 4/13. 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 5/295:41 pm
STL
- MDT
1 stop5h 49m
United Airlines
Sun 5/316:30 am
MDT
- STL
1 stop5h 04m
United Airlines
Deal found 4/13![United Airlines logo]()
$310
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 April 17, 2026.
Search for one-way flight options from St. Louis to Harrisburg. Find affordable one-way fares based on user searches. Data last updated April 17, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/146:55 pm
STL
- MDT
2 stops21h 31m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 4/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/155:27 pm
STL
- MDT
2 stops40h 53m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$199
This Delta deal was found by Cheapflights users on 4/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/195:15 pm
STL
- MDT
1 stop5h 36m
Delta
Deal found 4/12![Delta logo]()
$242
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/18:23 pm
STL
- MDT
3 stops42h 13m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$244
This United Airlines deal was found by Cheapflights users on 4/13. 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 5/266:00 am
STL
- MDT
1 stop6h 42m
United Airlines
Deal found 4/13![United Airlines logo]()
$263
This American Airlines deal was found by Cheapflights users on 4/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/156:29 am
STL
- MDT
1 stop6h 49m
American Airlines
Deal found 4/15![American Airlines logo]()
$267
This Kiwi.com deal was found by Cheapflights users on 4/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/299:06 pm
STL
- MDT
3 stops43h 01m
Multiple Airlines
Deal found 4/12![Multiple Airlines logo]()
$270
This United Airlines deal was found by Cheapflights users on 4/15. 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.
Sat 5/97:45 am
STL
- MDT
1 stop4h 48m
United Airlines
Deal found 4/15![United Airlines logo]()
$279
This American Airlines deal was found by Cheapflights users on 4/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/14:30 pm
STL
- MDT
1 stop6h 29m
American Airlines
Deal found 4/16![American Airlines logo]()
$325
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 April 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $291 (Delta) |
One-way from | $146 (Kiwi.com) |
Popular in | August |
Cheapest in | April |
Average price | $279 |
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 April 17, 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
St. LouisHarrisburg
STL - MDT
STLMDT
Lambert-St Louis
Sat 5/16
5:21 pm-11:52 pm
1 stop5h 31m
Harrisburg
Mon 5/18
6:43 pm-11:56 pm
1 stop6h 13m
$310
St. LouisHarrisburg
STL - MDT
STLMDT
Lambert-St Louis
Tue 4/28
9:10 am-4:51 pm
1 stop6h 41m
Harrisburg
Sat 5/2
5:54 pm-9:13 pm
1 stop4h 19m
$339
Quickest round-trip
St. LouisHarrisburg
STL - MDT
STLMDT
Lambert-St Louis
Sat 7/11
6:30 am-11:31 am
1 stop4h 01m
Harrisburg
Sun 7/12
6:00 am-9:31 am
1 stop4h 31m
$365
St. LouisHarrisburg
STL - MDT
STLMDT
Lambert-St Louis
Wed 6/24
6:30 am-11:42 am
1 stop4h 12m
Harrisburg
Sun 7/12
6:00 am-9:31 am
1 stop4h 31m
$405
St. LouisHarrisburg
STL - MDT
STLMDT
Lambert-St Louis
Thu 6/25
1:13 pm-9:01 pm
1 stop6h 48m
Harrisburg
Sun 7/12
6:30 am-12:11 pm
1 stop6h 41m
$409
St. LouisHarrisburg
STL - MDT
STLMDT
Lambert-St Louis
Fri 7/10
6:00 am-11:10 am
1 stop4h 10m
Harrisburg
Sun 7/12
6:00 am-9:31 am
1 stop4h 31m
$409
St. LouisHarrisburg
STL - MDT
STLMDT
Lambert-St Louis
Fri 6/19
5:41 pm-12:30 am
1 stop5h 49m
Harrisburg
Sun 6/21
6:15 am-3:46 pm
2 stops10h 31m
$640
St. LouisHarrisburg
STL - MDT
STLMDT
Lambert-St Louis
Mon 4/27
5:59 pm-11:03 pm
1 stop4h 04m
Harrisburg
Thu 4/30
6:19 pm-11:36 pm
1 stop6h 17m
$649
St. LouisHarrisburg
STL - MDT
STLMDT
Lambert-St Louis
Mon 7/6
9:23 am-6:44 pm
2 stops8h 21m
Harrisburg
Thu 7/9
5:55 pm-9:26 pm
1 stop4h 31m
$791
St. LouisHarrisburg
STL - MDT
STLMDT
Lambert-St Louis
Fri 7/10
1:13 pm-11:30 pm
2 stops9h 17m
Harrisburg
Sun 7/12
6:30 am-12:11 pm
1 stop6h 41m
$807
Showing 1-10 of 21 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 April.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| 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
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 $279). Flying from St. Louis to Harrisburg in August is currently the most expensive (average of $402). 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?
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 April 17, 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
Entertainment
7.8
Overall
7.9
Food
7.2
Boarding
8.1
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Entertainment
7.8
Overall
7.9
Food
7.2
Boarding
8.1
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Entertainment
7.8
Overall
7.9
Food
7.2
Boarding
8.1
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Entertainment
7.8
Overall
7.9
Food
7.2
Boarding
8.1
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
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
Browse other St. Louis and Harrisburg flight options. Last updated on April 17, 2026.
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Check out other popular destinations found by fellow travelers in 2026
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 April 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$248 | Average$310 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$248 | Average$318 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$260 | Average$343 | FlexibilityNo cancel fee | On-time69% |