$70+ Cheap flights from Missouri to Pennsylvania
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 4/16. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PHL
Apr 21 — Apr 281
Round-trip
1 adult, Economy
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Cheapest flights from Missouri to PennsylvaniaExplore the most affordable flight options available from Missouri to Pennsylvania. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 22, 2026.
Explore the most affordable flight options available from Missouri to Pennsylvania. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 22, 2026.
This Expedia deal was found by Cheapflights users on 3/20. 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.
Fri 5/18:23 pm
STL
- PHL
1 stop10h 47m
Frontier
Fri 5/88:35 pm
PHL
- STL
1 stop23h 48m
Frontier
Deal found 3/20![Frontier logo]()
$140
This Frontier deal was found by Cheapflights users on 3/21. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/56:41 pm
STL
- EWR
1 stop5h 37m
Frontier
Tue 5/1210:29 pm
EWR
- STL
1 stop11h 26m
Frontier
Deal found 3/21![Frontier logo]()
$142
This CheapOair deal was found by Cheapflights users on 3/21. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/48:17 pm
STL
- PHL
1 stop8h 17m
Frontier
Fri 5/88:35 pm
PHL
- STL
1 stop23h 48m
Frontier
Deal found 3/21![Frontier logo]()
$151
This Frontier deal was found by Cheapflights users on 3/20. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/3011:21 am
STL
- PHL
1 stop6h 58m
Frontier
Sat 5/24:42 pm
PHL
- STL
1 stop7h 37m
Frontier
Deal found 3/20![Frontier logo]()
$160
This Expedia deal was found by Cheapflights users on 3/21. 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.
Thu 4/1611:53 am
MCI
- PHL
1 stop12h 01m
Frontier
Thu 4/235:05 am
PHL
- MCI
1 stop6h 53m
Frontier
Deal found 3/21![Frontier logo]()
$160
This Frontier deal was found by Cheapflights users on 3/22. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/155:27 pm
STL
- EWR
1 stop6h 51m
Frontier
Sun 5/1710:29 pm
EWR
- STL
1 stop11h 26m
Frontier
Deal found 3/22![Frontier logo]()
$160
This Booking.com deal was found by Cheapflights users on 3/21. 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.
Mon 5/118:08 pm
STL
- PHL
1 stop8h 29m
Frontier
Fri 5/1510:11 am
PHL
- STL
1 stop15h 10m
Frontier
Deal found 3/21![Frontier logo]()
$167
This CheapOair deal was found by Cheapflights users on 3/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/88:16 pm
STL
- PHL
1 stop8h 15m
Frontier
Wed 4/158:41 pm
PHL
- STL
1 stop23h 40m
Frontier
Deal found 3/20![Frontier logo]()
$171
This CheapOair deal was found by Cheapflights users on 3/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/62:34 pm
MCI
- PHL
1 stop14h 03m
Frontier
Tue 5/128:35 pm
PHL
- MCI
1 stop18h 14m
Frontier
Deal found 3/20![Frontier logo]()
$171
This Expedia deal was found by Cheapflights users on 3/21. 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.
Sat 5/22:51 pm
MCI
- PHL
1 stop13h 44m
Frontier
Tue 5/128:35 pm
PHL
- MCI
1 stop18h 14m
Frontier
Deal found 3/21![Frontier logo]()
$180
This Frontier deal was found by Cheapflights users on 3/20. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1711:19 am
MCI
- EWR
1 stop9h 10m
Frontier
Sun 4/195:59 am
EWR
- MCI
1 stop5h 59m
Frontier
Deal found 3/20![Frontier logo]()
$180
This Frontier deal was found by Cheapflights users on 3/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1611:25 am
STL
- EWR
1 stop9h 04m
Frontier
Sun 4/1910:29 pm
EWR
- STL
1 stop9h 21m
Frontier
Deal found 3/17![Frontier logo]()
$180
Best flights from Missouri to PennsylvaniaDiscover carefully curated flight deals from Missouri to Pennsylvania that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 22, 2026.
Discover carefully curated flight deals from Missouri to Pennsylvania that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 22, 2026.
This United Airlines deal was found by Cheapflights users on 3/17. 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 4/1510:00 am
STL
- IAD
1 stop6h 28m
United Airlines
Wed 4/225:41 pm
IAD
- STL
1 stop7h 16m
United Airlines
Deal found 3/17![United Airlines logo]()
$257
This Delta deal was found by Cheapflights users on 3/17. 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 5/186:15 pm
STL
- IAD
1 stop3h 41m
Delta
Wed 5/205:33 pm
IAD
- STL
1 stop7h 26m
Delta
Deal found 3/17![Delta logo]()
$271
This Southwest deal was found by Cheapflights users on 3/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/116:00 am
STL
- LGA
Nonstop2h 20m
Southwest
Wed 4/155:30 pm
LGA
- STL
Nonstop2h 55m
Southwest
Deal found 3/17![Southwest logo]()
$294
This Southwest deal was found by Cheapflights users on 3/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/75:45 am
STL
- LGA
Nonstop2h 20m
Southwest
Wed 6/106:30 am
LGA
- STL
Nonstop2h 35m
Southwest
Deal found 3/17![Southwest logo]()
$295
This Delta deal was found by Cheapflights users on 3/17. 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 4/2810:07 am
STL
- LGA
Nonstop2h 22m
Delta
Sat 5/26:00 am
LGA
- STL
1 stop5h 34m
Delta
Deal found 3/17![Delta logo]()
$304
This United Airlines deal was found by Cheapflights users on 3/17. 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 6/106:00 am
STL
- EWR
Nonstop2h 29m
United Airlines
Mon 6/1510:07 pm
EWR
- STL
Nonstop2h 28m
United Airlines
Deal found 3/17![United Airlines logo]()
$305
This Delta deal was found by Cheapflights users on 3/17. 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 5/206:00 am
STL
- LGA
Nonstop2h 28m
Delta
Thu 5/286:00 am
LGA
- STL
1 stop4h 29m
Delta
Deal found 3/17![Delta logo]()
$304
This Southwest deal was found by Cheapflights users on 3/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/248:00 pm
STL
- LGA
Nonstop2h 25m
Southwest
Tue 4/287:15 am
LGA
- STL
1 stop7h 35m
Southwest
Deal found 3/17![Southwest logo]()
$305
This United Airlines deal was found by Cheapflights users on 3/17. 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 6/76:00 am
STL
- EWR
Nonstop2h 29m
United Airlines
Wed 6/1010:07 pm
EWR
- STL
Nonstop2h 28m
United Airlines
Deal found 3/17![United Airlines logo]()
$305
This Delta deal was found by Cheapflights users on 3/18. 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 4/286:00 am
STL
- IAD
1 stop4h 42m
Delta
Thu 4/306:00 am
IAD
- STL
1 stop6h 56m
Delta
Deal found 3/18![Delta logo]()
$308
This United Airlines deal was found by Cheapflights users on 3/17. 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 4/216:15 am
STL
- EWR
Nonstop2h 36m
United Airlines
Fri 4/247:10 am
EWR
- STL
1 stop6h 12m
United Airlines
Deal found 3/17![United Airlines logo]()
$315
This Southwest deal was found by Cheapflights users on 3/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/238:00 pm
STL
- LGA
Nonstop2h 25m
Southwest
Sat 4/256:05 am
LGA
- STL
1 stop9h 15m
Southwest
Deal found 3/17![Southwest logo]()
$318
This Delta deal was found by Cheapflights users on 3/19. 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 4/149:59 am
STL
- EWR
1 stop4h 25m
Delta
Sat 4/186:00 am
EWR
- STL
1 stop6h 56m
Delta
Deal found 3/19![Delta logo]()
$314
This Southwest deal was found by Cheapflights users on 3/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/307:55 pm
STL
- PHL
Nonstop2h 10m
Southwest
Mon 5/412:20 pm
PHL
- STL
Nonstop2h 25m
Southwest
Deal found 3/18![Southwest logo]()
$319
This United Airlines deal was found by Cheapflights users on 3/20. 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 5/271:13 pm
STL
- EWR
1 stop5h 03m
United Airlines
Sun 5/3110:07 pm
EWR
- STL
Nonstop2h 28m
United Airlines
Deal found 3/20![United Airlines logo]()
$347
This Delta deal was found by Cheapflights users on 3/19. 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 5/146:00 am
STL
- LGA
Nonstop2h 28m
Delta
Sun 5/176:30 am
LGA
- STL
Nonstop2h 43m
Delta
Deal found 3/19![Delta logo]()
$316
This Southwest deal was found by Cheapflights users on 3/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/205:35 am
STL
- PHL
2 stops7h 20m
Southwest
Wed 6/32:00 pm
PHL
- STL
2 stops8h 15m
Southwest
Deal found 3/17![Southwest logo]()
$328
This KAYAK deal was found by Cheapflights users on 3/17. 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 4/205:45 pm
MCI
- IAD
Nonstop2h 35m
United Airlines
Thu 4/236:15 am
IAD
- MCI
1 stop5h 12m
United Airlines
Deal found 3/17![United Airlines logo]()
$348
This Delta deal was found by Cheapflights users on 3/19. 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 5/15:27 pm
STL
- LGA
Nonstop2h 33m
Delta
Sun 5/37:38 am
LGA
- STL
Nonstop2h 49m
Delta
Deal found 3/19![Delta logo]()
$317
This Southwest deal was found by Cheapflights users on 3/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/276:15 am
MCI
- LGA
Nonstop2h 40m
Southwest
Wed 6/36:55 am
LGA
- MCI
2 stops8h 40m
Southwest
Deal found 3/18![Southwest logo]()
$346
This United Airlines deal was found by Cheapflights users on 3/17. 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 4/226:05 am
MCI
- EWR
Nonstop3h 01m
United Airlines
Sat 4/257:59 pm
EWR
- MCI
Nonstop3h 31m
United Airlines
Deal found 3/17![United Airlines logo]()
$352
This Delta deal was found by Cheapflights users on 3/19. 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 4/187:20 am
STL
- LGA
Nonstop2h 30m
Delta
Mon 4/201:00 pm
LGA
- STL
1 stop5h 44m
Delta
Deal found 3/19![Delta logo]()
$325
This Southwest deal was found by Cheapflights users on 3/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/226:15 am
MCI
- LGA
Nonstop2h 40m
Southwest
Sat 4/257:30 am
LGA
- MCI
Nonstop3h 15m
Southwest
Deal found 3/17![Southwest logo]()
$352
This United Airlines deal was found by Cheapflights users on 3/19. 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 4/166:15 am
STL
- EWR
Nonstop2h 36m
United Airlines
Thu 4/239:59 pm
EWR
- STL
Nonstop2h 58m
United Airlines
Deal found 3/19![United Airlines logo]()
$356
This Delta deal was found by Cheapflights users on 3/17. 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 6/104:13 pm
STL
- JFK
Nonstop2h 28m
Delta
Mon 6/153:10 pm
JFK
- STL
Nonstop2h 45m
Delta
Deal found 3/17![Delta logo]()
$325
This United Airlines deal was found by Cheapflights users on 3/17. 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 6/259:23 am
STL
- IAD
1 stop6h 03m
United Airlines
Mon 6/299:00 am
IAD
- STL
Nonstop2h 27m
United Airlines
Deal found 3/17![United Airlines logo]()
$357
This Delta deal was found by Cheapflights users on 3/18. 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 4/156:50 pm
STL
- JFK
1 stop4h 58m
Delta
Sun 4/197:08 am
JFK
- STL
1 stop6h 57m
Delta
Deal found 3/18![Delta logo]()
$325
This Southwest deal was found by Cheapflights users on 3/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/14:55 pm
MCI
- LGA
1 stop5h 00m
Southwest
Wed 6/102:30 pm
LGA
- MCI
Nonstop3h 10m
Southwest
Deal found 3/17![Southwest logo]()
$362
This Delta deal was found by Cheapflights users on 3/19. 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 5/96:45 am
STL
- LGA
1 stop4h 04m
Delta
Sun 5/106:30 am
LGA
- STL
Nonstop2h 43m
Delta
Deal found 3/19![Delta logo]()
$326
This United Airlines deal was found by Cheapflights users on 3/17. 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 6/16:00 am
MCI
- EWR
Nonstop2h 53m
United Airlines
Wed 6/1010:24 am
EWR
- MCI
1 stop6h 36m
United Airlines
Deal found 3/17![United Airlines logo]()
$362
Last-minute flights from Missouri to PennsylvaniaDiscover last-minute flight deals from Missouri to Pennsylvania. Data last updated March 22, 2026 and is based on user searches.
Discover last-minute flight deals from Missouri to Pennsylvania. Data last updated March 22, 2026 and is based on user searches.
This Priceline deal was found by Cheapflights users on 3/20. 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.
Tue 4/711:21 am
STL
- EWR
1 stop9h 08m
Frontier
Fri 4/101:30 pm
EWR
- STL
1 stop11h 28m
Frontier
Deal found 3/20![Frontier logo]()
$181
This CheapOair deal was found by Cheapflights users on 3/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/88:16 pm
STL
- PHL
1 stop8h 15m
Frontier
Wed 4/158:41 pm
PHL
- STL
1 stop23h 40m
Frontier
Deal found 3/20![Frontier logo]()
$171
This Priceline deal was found by Cheapflights users on 3/21. 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.
Fri 4/108:16 pm
STL
- PHL
1 stop8h 15m
Frontier
Sun 4/125:01 am
PHL
- STL
1 stop6h 37m
Frontier
Deal found 3/21![Frontier logo]()
$181
This CheapOair deal was found by Cheapflights users on 3/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/108:16 pm
STL
- PHL
1 stop8h 15m
Frontier
Fri 4/178:36 pm
PHL
- STL
1 stop23h 56m
Frontier
Deal found 3/20![Frontier logo]()
$192
This Expedia deal was found by Cheapflights users on 3/21. 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.
Thu 4/1611:53 am
MCI
- PHL
1 stop12h 01m
Frontier
Thu 4/235:05 am
PHL
- MCI
1 stop6h 53m
Frontier
Deal found 3/21![Frontier logo]()
$160
This Frontier deal was found by Cheapflights users on 3/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1611:25 am
STL
- EWR
1 stop9h 04m
Frontier
Sun 4/1910:29 pm
EWR
- STL
1 stop9h 21m
Frontier
Deal found 3/17![Frontier logo]()
$180
This Expedia deal was found by Cheapflights users on 3/18. 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.
Fri 4/178:23 pm
STL
- PHL
1 stop10h 47m
Frontier
Mon 4/2010:38 pm
PHL
- STL
1 stop25h 41m
Frontier
Deal found 3/18![Frontier logo]()
$180
This Frontier deal was found by Cheapflights users on 3/20. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1711:19 am
MCI
- EWR
1 stop9h 10m
Frontier
Sun 4/195:59 am
EWR
- MCI
1 stop5h 59m
Frontier
Deal found 3/20![Frontier logo]()
$180
This CheapOair deal was found by Cheapflights users on 3/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/172:15 pm
MCI
- PHL
1 stop14h 19m
Frontier
Sun 4/195:05 am
PHL
- MCI
1 stop6h 53m
Frontier
Deal found 3/20![Frontier logo]()
$191
This Booking.com deal was found by Cheapflights users on 3/19. 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.
Sat 4/184:16 pm
STL
- PHL
1 stop11h 57m
Frontier
Tue 4/217:56 pm
PHL
- STL
1 stop28h 23m
Frontier
Deal found 3/19![Frontier logo]()
$187
This Expedia deal was found by Cheapflights users on 3/20. 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 4/224:59 pm
STL
- PHL
1 stop27h 34m
Frontier
Tue 4/287:56 pm
PHL
- STL
1 stop28h 23m
Frontier
Deal found 3/20![Frontier logo]()
$140
This Frontier deal was found by Cheapflights users on 3/20. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/3011:21 am
STL
- PHL
1 stop6h 58m
Frontier
Sat 5/24:42 pm
PHL
- STL
1 stop7h 37m
Frontier
Deal found 3/20![Frontier logo]()
$160
One-way flights from Missouri to PennsylvaniaSearch for one-way flight options from Missouri to Pennsylvania. Find affordable one-way fares based on user searches. Data last updated March 22, 2026.
Search for one-way flight options from Missouri to Pennsylvania. Find affordable one-way fares based on user searches. Data last updated March 22, 2026.
This Frontier deal was found by Cheapflights users on 3/19. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1611:25 am
STL
- PHL
1 stop5h 24m
Frontier
Deal found 3/19![Frontier logo]()
$70
This Frontier deal was found by Cheapflights users on 3/20. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/65:27 pm
STL
- IAD
1 stop4h 42m
Frontier
Deal found 3/20![Frontier logo]()
$70
This Frontier deal was found by Cheapflights users on 3/20. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/65:27 pm
STL
- EWR
1 stop6h 51m
Frontier
Deal found 3/20![Frontier logo]()
$70
This Frontier deal was found by Cheapflights users on 3/20. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/56:41 pm
STL
- EWR
1 stop5h 37m
Frontier
Deal found 3/20![Frontier logo]()
$71
This Frontier deal was found by Cheapflights users on 3/19. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/208:23 pm
STL
- PHL
1 stop11h 48m
Frontier
Deal found 3/19![Frontier logo]()
$76
This Expedia deal was found by Cheapflights users on 3/21. 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 4/158:23 pm
STL
- IAD
1 stop11h 33m
Frontier
Deal found 3/21![Frontier logo]()
$76
This Booking.com deal was found by Cheapflights users on 3/22. 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.
Tue 4/214:59 pm
STL
- EWR
1 stop19h 00m
Frontier
Deal found 3/22![Frontier logo]()
$76
This Expedia deal was found by Cheapflights users on 3/21. 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.
Tue 4/214:59 pm
STL
- PHL
1 stop16h 39m
Frontier
Deal found 3/21![Frontier logo]()
$78
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 5/56:41 pm
STL
- IAD
1 stop21h 46m
Frontier
Deal found 3/17![Frontier logo]()
$78
This Cheapflightsfares deal was found by Cheapflights users on 3/17. 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 3/255:45 am
MCI
- EWR
1 stop6h 03m
Spirit Airlines
Deal found 3/17![Spirit Airlines logo]()
$81
This CheapOair deal was found by Cheapflights users on 3/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/94:19 pm
STL
- PHL
1 stop15h 35m
Frontier
Deal found 3/20![Frontier logo]()
$82
This Trip.com deal was found by Cheapflights users on 3/18. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/275:08 pm
MCI
- EWR
1 stop7h 00m
Frontier
Deal found 3/18![Frontier logo]()
$83
Find flight deals from Missouri to Pennsylvania
Keep the following information in mind while searching for Missouri to Pennsylvania flight deals. Data was last updated March 22, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $140 (Expedia) |
One-way from | $70 (Frontier) |
Popular in | November |
Cheapest in | August |
Average price | $463 |
Good round-trip deal | $331 or less |
Good one-way deal | $317 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Missouri to Pennsylvania 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 March 22, 2026.
Use the filters below to find and compare flights from Missouri to Pennsylvania that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisWashington, D.C.
STL - IAD
STLIAD
Lambert-St Louis
Wed 4/15
10:00 am-5:28 pm
1 stop6h 28m
Washington, D.C. Dulles Intl
Wed 4/22
5:41 pm-11:57 pm
1 stop7h 16m
$257
St. LouisWashington, D.C.
STL - IAD
STLIAD
Lambert-St Louis
Mon 5/18
6:15 pm-10:56 pm
1 stop3h 41m
Washington, D.C. Dulles Intl
Wed 5/20
5:33 pm-11:59 pm
1 stop7h 26m
$271
St. LouisNew York
STL - LGA
STLLGA
Lambert-St Louis
Sat 4/11
6:00 am-9:20 am
Nonstop2h 20m
New York LaGuardia
Wed 4/15
5:30 pm-7:25 pm
Nonstop2h 55m
$294
St. LouisNew York
STL - LGA
STLLGA
Lambert-St Louis
Sun 6/7
5:45 am-9:05 am
Nonstop2h 20m
New York LaGuardia
Wed 6/10
6:30 am-8:05 am
Nonstop2h 35m
$295
St. LouisNew York
STL - LGA
STLLGA
Lambert-St Louis
Tue 4/28
10:07 am-1:29 pm
Nonstop2h 22m
New York LaGuardia
Sat 5/2
6:00 am-10:34 am
1 stop5h 34m
$304
St. LouisNew York
STL - LGA
STLLGA
Lambert-St Louis
Wed 5/20
6:00 am-9:28 am
Nonstop2h 28m
New York LaGuardia
Thu 5/28
6:00 am-9:29 am
1 stop4h 29m
$304
St. LouisNewark
STL - EWR
STLEWR
Lambert-St Louis
Wed 6/10
6:00 am-9:29 am
Nonstop2h 29m
Newark
Mon 6/15
10:07 pm-11:35 pm
Nonstop2h 28m
$305
St. LouisNew York
STL - LGA
STLLGA
Lambert-St Louis
Fri 4/24
8:00 pm-11:25 pm
Nonstop2h 25m
New York LaGuardia
Tue 4/28
7:15 am-1:50 pm
1 stop7h 35m
$305
St. LouisNewark
STL - EWR
STLEWR
Lambert-St Louis
Sun 6/7
6:00 am-9:29 am
Nonstop2h 29m
Newark
Wed 6/10
10:07 pm-11:35 pm
Nonstop2h 28m
$305
St. LouisWashington, D.C.
STL - IAD
STLIAD
Lambert-St Louis
Tue 4/28
6:00 am-11:42 am
1 stop4h 42m
Washington, D.C. Dulles Intl
Thu 4/30
6:00 am-11:56 am
1 stop6h 56m
$308
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Missouri to Pennsylvania
Have a flexible travel schedule? Discover the best time to fly to Pennsylvania from Missouri with our price prediction graph.
STL-PHL
STL-EWR
MCI-PHL
MCI-EWR
STL-IAD
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 Missouri to Pennsylvania
USMO-USPA
STL-PHL
STL-EWR
MCI-PHL
MCI-EWR
What is the cheapest month to book a flight from Missouri to Pennsylvania?
Currently, August is the cheapest month in which you can book a flight from Missouri to Pennsylvania (average of $119). Flying from Missouri to Pennsylvania in March is currently the most expensive (average of $237). 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 MO to PA?
Find hourly flight availability from Missouri to Pennsylvania. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 22, 2026.
It’s optimal to fly from Missouri to Pennsylvania in the evening. By choosing this option you can save up to 59% on the cost of your flight, compared to a flight at noon.
What is the cheapest day to fly from Missouri to Pennsylvania?
Use this chart to determine the cheapest time to fly round-trip from Missouri to Pennsylvania. Price data was last updated on March 14, 2026.
Travelers seeking maximum savings on their Missouri to Pennsylvania flight should consider departing on Tuesday evenings when fares are most often at their lowest. Tuesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Missouri to Pennsylvania
Explore weekly flight availability from Missouri to Pennsylvania. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated March 22, 2026.
The most flights from USMO to USPA are scheduled on a Friday (7 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (3 on average).
Reviews of airlines servicing Pennsylvania
Get insights into the airlines that provide service to Pennsylvania. 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 Pennsylvania. Reviews last updated March 22, 2026.
See what other customers who have flown with Southwest,Delta, andUnited Airlines from Missouri to Pennsylvania have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Overall
8.0
Food
7.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Overall
8.0
Food
7.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Overall
8.0
Food
7.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Overall
8.0
Food
7.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Overall
8.0
Food
7.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Overall
8.0
Food
7.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Related info for your journey
Find useful and relevant information for your journey from Missouri to Pennsylvania. 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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Alternative routes for Missouri to Pennsylvania
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Pennsylvania by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Missouri to Pennsylvania by cabin class
Find flights from Missouri to Pennsylvania, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Missouri and Pennsylvania flights
Browse other Missouri and Pennsylvania flight options. Last updated on March 22, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Pennsylvania
Find the right flight back to Missouri after your stay in Pennsylvania
Missouri to Pennsylvania flights
Consider these flights traveling from Missouri to Pennsylvania.
Top 6 airlines flying from Missouri to Pennsylvania
Discover the top 6 airlines that operate flights from Missouri to Pennsylvania. 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 March 22, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$82 | Average$213 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$119 | Average$235 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$204 | Average$390 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$208 | Average$433 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$235 | Average$408 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$238 | Average$419 | FlexibilityNo cancel fee | On-time69% |