$63+ Cheap flights from Pennsylvania to Missouri
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 6/17. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — MCI
Jun 19 — Jun 261
Round-trip
1 adult, Economy
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Cheapest flights from Pennsylvania to MissouriExplore the most affordable flight options available from Pennsylvania to Missouri. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 20, 2026.
Explore the most affordable flight options available from Pennsylvania to Missouri. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 20, 2026.
This Super.com deal was found by Cheapflights users on 5/15. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/211:35 am
PHL
- STL
1 stop7h 43m
Frontier
Mon 7/68:08 pm
STL
- PHL
1 stop8h 31m
Frontier
Deal found 5/15![Frontier logo]()
$226
This Frontier deal was found by Cheapflights users on 5/18. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/116:30 am
PHL
- STL
1 stop12h 00m
Frontier
Mon 6/152:56 pm
STL
- PHL
1 stop14h 31m
Frontier
Deal found 5/18![Frontier logo]()
$228
This Frontier deal was found by Cheapflights users on 5/17. 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.
Sun 6/76:10 am
PHL
- STL
1 stop9h 21m
Frontier
Mon 6/152:56 pm
STL
- PHL
1 stop14h 31m
Frontier
Deal found 5/17![Frontier logo]()
$229
This Frontier deal was found by Cheapflights users on 5/17. 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.
Sun 6/78:30 am
PHL
- STL
1 stop10h 03m
Frontier
Sun 6/146:31 pm
STL
- PHL
1 stop11h 48m
Frontier
Deal found 5/17![Frontier logo]()
$230
This CheapOair deal was found by Cheapflights users on 5/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/66:30 am
PHL
- STL
1 stop12h 07m
Frontier
Mon 8/104:09 pm
STL
- PHL
1 stop15h 42m
Frontier
Deal found 5/16![Frontier logo]()
$233
This CheapOair deal was found by Cheapflights users on 5/15. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/58:35 pm
PHL
- STL
1 stop23h 48m
Frontier
Mon 6/84:19 pm
STL
- PHL
1 stop6h 10m
Frontier
Deal found 5/15![Frontier logo]()
$234
This Orbitz deal was found by Cheapflights users on 5/19. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/15:10 pm
PHL
- STL
1 stop7h 39m
Frontier
Tue 7/77:03 pm
STL
- PHL
1 stop10h 19m
Frontier
Deal found 5/19![Frontier logo]()
$236
This CheapOair deal was found by Cheapflights users on 5/18. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/3010:29 pm
EWR
- STL
1 stop11h 28m
Frontier
Mon 8/34:09 pm
STL
- EWR
1 stop17h 22m
Frontier
Deal found 5/18![Frontier logo]()
$238
This CheapOair deal was found by Cheapflights users on 5/15. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/268:37 pm
PHL
- STL
1 stop23h 16m
Frontier
Mon 6/294:17 pm
STL
- PHL
1 stop15h 34m
Frontier
Deal found 5/15![Frontier logo]()
$239
This CheapOair deal was found by Cheapflights users on 5/18. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/411:30 am
EWR
- STL
1 stop13h 44m
Frontier
Tue 9/84:10 pm
STL
- EWR
1 stop17h 17m
Frontier
Deal found 5/18![Frontier logo]()
$240
This CheapOair deal was found by Cheapflights users on 5/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/145:57 pm
PHL
- STL
1 stop26h 42m
Frontier
Wed 10/218:10 pm
STL
- PHL
1 stop8h 26m
Frontier
Deal found 5/16![Frontier logo]()
$240
This Kiwi.com deal was found by Cheapflights users on 5/17. 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.
Wed 6/1710:29 pm
EWR
- STL
1 stop20h 01m
Frontier
Sun 6/216:31 pm
STL
- EWR
2 stops14h 59m
Frontier
Deal found 5/17![Frontier logo]()
$241
Best flights from Pennsylvania to MissouriDiscover carefully curated flight deals from Pennsylvania to Missouri that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 20, 2026.
Discover carefully curated flight deals from Pennsylvania to Missouri that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 20, 2026.
This Southwest deal was found by Cheapflights users on 5/18. 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.
Tue 7/147:25 am
PHL
- STL
1 stop4h 50m
Southwest
Tue 7/217:10 pm
STL
- PHL
Nonstop2h 10m
Southwest
Deal found 5/18![Southwest logo]()
$287
This Delta deal was found by Cheapflights users on 5/18. 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 7/156:00 am
JFK
- STL
1 stop7h 17m
Delta
Wed 7/226:00 am
STL
- JFK
1 stop5h 00m
Delta
Deal found 5/18![Delta logo]()
$313
This United Airlines deal was found by Cheapflights users on 5/16. 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.
Tue 6/1610:07 pm
EWR
- STL
Nonstop2h 29m
United Airlines
Wed 6/176:00 am
STL
- EWR
Nonstop2h 29m
United Airlines
Deal found 5/16![United Airlines logo]()
$373
This KAYAK deal was found by Cheapflights users on 5/18. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/86:30 am
JFK
- MCI
1 stop5h 55m
American Airlines
Thu 6/116:39 am
MCI
- JFK
1 stop6h 56m
American Airlines
Deal found 5/18![American Airlines logo]()
$421
This Delta deal was found by Cheapflights users on 5/18. 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.
Fri 8/148:28 am
IAD
- STL
1 stop4h 18m
Delta
Tue 8/1811:00 am
STL
- IAD
1 stop4h 41m
Delta
Deal found 5/18![Delta logo]()
$317
This Southwest deal was found by Cheapflights users on 5/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/66:20 am
PHL
- STL
Nonstop2h 15m
Southwest
Mon 8/107:05 pm
STL
- PHL
Nonstop2h 10m
Southwest
Deal found 5/19![Southwest logo]()
$319
This Delta deal was found by Cheapflights users on 5/17. 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.
Thu 8/66:10 am
DCA
- MCI
1 stop4h 35m
Delta
Tue 8/1810:31 am
MCI
- DCA
1 stop7h 14m
Delta
Deal found 5/17![Delta logo]()
$318
This Southwest deal was found by Cheapflights users on 5/17. 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 5/236:00 am
LGA
- STL
Nonstop2h 45m
Southwest
Sun 5/245:40 am
STL
- LGA
Nonstop2h 20m
Southwest
Deal found 5/17![Southwest logo]()
$324
This Delta deal was found by Cheapflights users on 5/18. 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.
Thu 8/66:00 am
IAD
- MCI
1 stop4h 45m
Delta
Tue 8/187:07 am
MCI
- IAD
1 stop5h 57m
Delta
Deal found 5/18![Delta logo]()
$318
This United Airlines deal was found by Cheapflights users on 5/19. 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 8/610:31 am
IAD
- MCI
1 stop4h 49m
United Airlines
Tue 8/185:39 pm
MCI
- IAD
Nonstop2h 39m
United Airlines
Deal found 5/19![United Airlines logo]()
$388
This Southwest deal was found by Cheapflights users on 5/18. 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.
Fri 6/268:55 am
LGA
- STL
Nonstop2h 50m
Southwest
Tue 6/303:25 pm
STL
- LGA
Nonstop2h 30m
Southwest
Deal found 5/18![Southwest logo]()
$331
This Delta deal was found by Cheapflights users on 5/15. 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.
Tue 6/166:51 pm
LGA
- STL
Nonstop2h 55m
Delta
Sat 7/43:39 pm
STL
- LGA
1 stop4h 46m
Delta
Deal found 5/15![Delta logo]()
$329
This United Airlines deal was found by Cheapflights users on 5/15. 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.
Wed 5/2710:07 pm
EWR
- STL
Nonstop2h 28m
United Airlines
Fri 5/296:00 am
STL
- EWR
Nonstop2h 29m
United Airlines
Deal found 5/15![United Airlines logo]()
$399
This Southwest deal was found by Cheapflights users on 5/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/106:55 am
DCA
- MCI
Nonstop2h 40m
Southwest
Sat 6/131:50 pm
MCI
- DCA
1 stop4h 05m
Southwest
Deal found 5/19![Southwest logo]()
$334
This United Airlines deal was found by Cheapflights users on 5/17. 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.
Fri 6/57:18 pm
DCA
- MCI
1 stop4h 55m
United Airlines
Tue 6/95:10 pm
MCI
- DCA
1 stop4h 44m
United Airlines
Deal found 5/17![United Airlines logo]()
$401
This Southwest deal was found by Cheapflights users on 5/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/129:00 am
LGA
- STL
Nonstop2h 50m
Southwest
Wed 7/155:55 pm
STL
- LGA
1 stop4h 00m
Southwest
Deal found 5/16![Southwest logo]()
$337
This Delta deal was found by Cheapflights users on 5/17. 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.
Sat 6/136:05 am
IAD
- STL
1 stop4h 27m
Delta
Mon 6/156:10 pm
STL
- IAD
1 stop4h 04m
Delta
Deal found 5/17![Delta logo]()
$337
This United Airlines deal was found by Cheapflights users on 5/17. 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 6/117:59 am
EWR
- STL
1 stop5h 12m
United Airlines
Sun 6/146:00 am
STL
- EWR
Nonstop2h 30m
United Airlines
Deal found 5/17![United Airlines logo]()
$401
This Delta deal was found by Cheapflights users on 5/15. 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.
Wed 5/276:29 am
JFK
- STL
1 stop6h 56m
Delta
Fri 5/298:53 am
STL
- JFK
1 stop7h 07m
Delta
Deal found 5/15![Delta logo]()
$339
This Southwest deal was found by Cheapflights users on 5/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/106:30 am
LGA
- STL
Nonstop2h 35m
Southwest
Sun 6/147:50 pm
STL
- LGA
Nonstop2h 25m
Southwest
Deal found 5/16![Southwest logo]()
$342
This United Airlines deal was found by Cheapflights users on 5/16. 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.
Sat 5/3010:07 pm
EWR
- STL
Nonstop2h 28m
United Airlines
Tue 6/26:00 am
STL
- EWR
Nonstop2h 29m
United Airlines
Deal found 5/16![United Airlines logo]()
$403
This Southwest deal was found by Cheapflights users on 5/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/208:15 am
LGA
- STL
Nonstop2h 40m
Southwest
Sun 6/215:45 am
STL
- LGA
Nonstop2h 20m
Southwest
Deal found 5/19![Southwest logo]()
$344
This Delta deal was found by Cheapflights users on 5/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/196:00 am
IAD
- STL
1 stop4h 46m
Delta
Tue 6/236:10 pm
STL
- IAD
1 stop4h 04m
Delta
Deal found 5/16![Delta logo]()
$350
This United Airlines deal was found by Cheapflights users on 5/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/1710:17 pm
EWR
- STL
Nonstop2h 27m
United Airlines
Wed 7/226:01 am
STL
- EWR
Nonstop2h 29m
United Airlines
Deal found 5/18![United Airlines logo]()
$411
This Southwest deal was found by Cheapflights users on 5/17. 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 6/258:55 am
LGA
- STL
Nonstop2h 50m
Southwest
Sat 6/278:00 pm
STL
- LGA
Nonstop2h 25m
Southwest
Deal found 5/17![Southwest logo]()
$344
This Delta deal was found by Cheapflights users on 5/19. 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 7/176:00 am
JFK
- STL
1 stop7h 17m
Delta
Tue 7/216:00 am
STL
- JFK
1 stop6h 20m
Delta
Deal found 5/19![Delta logo]()
$351
This United Airlines deal was found by Cheapflights users on 5/17. 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.
Fri 7/1710:17 pm
EWR
- STL
Nonstop2h 27m
United Airlines
Tue 7/216:01 am
STL
- EWR
Nonstop2h 29m
United Airlines
Deal found 5/17![United Airlines logo]()
$411
This Southwest deal was found by Cheapflights users on 5/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/246:05 pm
PHL
- STL
1 stop5h 00m
Southwest
Mon 9/288:00 am
STL
- PHL
2 stops8h 55m
Southwest
Deal found 5/16![Southwest logo]()
$344
This Delta deal was found by Cheapflights users on 5/19. 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.
Wed 6/106:30 am
LGA
- STL
Nonstop2h 39m
Delta
Sun 6/146:00 am
STL
- LGA
1 stop7h 48m
Delta
Deal found 5/19![Delta logo]()
$352
This United Airlines deal was found by Cheapflights users on 5/17. 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 7/2110:07 pm
EWR
- STL
Nonstop2h 29m
United Airlines
Thu 7/236:01 am
STL
- EWR
Nonstop2h 29m
United Airlines
Deal found 5/17![United Airlines logo]()
$411
Last-minute flights from Pennsylvania to MissouriDiscover last-minute flight deals from Pennsylvania to Missouri. Data last updated May 20, 2026 and is based on user searches.
Discover last-minute flight deals from Pennsylvania to Missouri. Data last updated May 20, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 5/15. 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.
Tue 6/210:29 pm
EWR
- STL
1 stop11h 26m
Frontier
Mon 7/134:52 pm
STL
- EWR
1 stop27h 36m
Frontier
Deal found 5/15![Frontier logo]()
$245
This Kiwi.com deal was found by Cheapflights users on 5/15. 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 6/45:55 am
EWR
- STL
1 stop28h 00m
Frontier
Mon 6/85:27 pm
STL
- EWR
1 stop6h 51m
Frontier
Deal found 5/15![Frontier logo]()
$240
This CheapOair deal was found by Cheapflights users on 5/15. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/58:35 pm
PHL
- STL
1 stop23h 48m
Frontier
Mon 6/84:19 pm
STL
- PHL
1 stop6h 10m
Frontier
Deal found 5/15![Frontier logo]()
$234
This Frontier deal was found by Cheapflights users on 5/17. 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.
Sun 6/76:10 am
PHL
- STL
1 stop9h 21m
Frontier
Mon 6/152:56 pm
STL
- PHL
1 stop14h 31m
Frontier
Deal found 5/17![Frontier logo]()
$229
This Frontier deal was found by Cheapflights users on 5/17. 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.
Sun 6/76:10 am
PHL
- STL
1 stop9h 21m
Frontier
Fri 6/124:17 pm
STL
- PHL
1 stop6h 26m
Frontier
Deal found 5/17![Frontier logo]()
$230
This Expedia deal was found by Cheapflights users on 5/17. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/811:30 am
EWR
- STL
1 stop13h 27m
Frontier
Mon 6/224:17 pm
STL
- EWR
1 stop17h 13m
Frontier
Deal found 5/17![Frontier logo]()
$244
This Kiwi.com deal was found by Cheapflights users on 5/17. 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 6/94:35 pm
PHL
- STL
1 stop17h 12m
Frontier
Wed 6/175:06 pm
STL
- PHL
2 stops30h 38m
Frontier
Deal found 5/17![Frontier logo]()
$242
This Trip.com deal was found by Cheapflights users on 5/16. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1011:30 am
EWR
- STL
1 stop13h 19m
Frontier
Tue 6/166:31 pm
STL
- EWR
1 stop5h 34m
Frontier
Deal found 5/16![Frontier logo]()
$238
This Frontier deal was found by Cheapflights users on 5/18. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/116:30 am
PHL
- STL
1 stop12h 00m
Frontier
Mon 6/152:56 pm
STL
- PHL
1 stop14h 31m
Frontier
Deal found 5/18![Frontier logo]()
$228
This Frontier deal was found by Cheapflights users on 5/17. 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.
Fri 6/1212:54 pm
PHL
- STL
1 stop11h 55m
Frontier
Sat 6/134:17 pm
STL
- PHL
1 stop6h 51m
Frontier
Deal found 5/17![Frontier logo]()
$244
This Kiwi.com deal was found by Cheapflights users on 5/17. 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.
Wed 6/1710:29 pm
EWR
- STL
1 stop20h 01m
Frontier
Sun 6/216:31 pm
STL
- EWR
2 stops14h 59m
Frontier
Deal found 5/17![Frontier logo]()
$241
This CheapOair deal was found by Cheapflights users on 5/15. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/268:37 pm
PHL
- STL
1 stop23h 16m
Frontier
Mon 6/294:17 pm
STL
- PHL
1 stop15h 34m
Frontier
Deal found 5/15![Frontier logo]()
$239
One-way flights from Pennsylvania to MissouriSearch for one-way flight options from Pennsylvania to Missouri. Find affordable one-way fares based on user searches. Data last updated May 20, 2026.
Search for one-way flight options from Pennsylvania to Missouri. Find affordable one-way fares based on user searches. Data last updated May 20, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1710:29 pm
EWR
- STL
1 stop20h 01m
Frontier
Deal found 5/18![Frontier logo]()
$63
This Kiwi.com deal was found by Cheapflights users on 5/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/165:58 am
EWR
- STL
1 stop12h 32m
Frontier
Deal found 5/19![Frontier logo]()
$65
This Trip.com deal was found by Cheapflights users on 5/16. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/410:29 pm
EWR
- MCI
1 stop20h 00m
Frontier
Deal found 5/16![Frontier logo]()
$80
This Trip.com deal was found by Cheapflights users on 5/16. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/115:58 am
EWR
- STL
1 stop12h 32m
Frontier
Deal found 5/16![Frontier logo]()
$81
This Kiwi.com deal was found by Cheapflights users on 5/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/1910:29 pm
EWR
- MCI
1 stop19h 52m
Frontier
Deal found 5/19![Frontier logo]()
$85
This Kiwi.com deal was found by Cheapflights users on 5/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/910:29 pm
EWR
- STL
1 stop11h 18m
Frontier
Deal found 5/19![Frontier logo]()
$86
This Kiwi.com deal was found by Cheapflights users on 5/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/910:29 pm
EWR
- MCI
1 stop19h 52m
Frontier
Deal found 5/19![Frontier logo]()
$88
This Kiwi.com deal was found by Cheapflights users on 5/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/210:29 pm
EWR
- STL
1 stop11h 26m
Frontier
Deal found 5/19![Frontier logo]()
$88
This Super.com deal was found by Cheapflights users on 5/18. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/145:59 pm
PHL
- STL
1 stop7h 00m
Frontier
Deal found 5/18![Frontier logo]()
$94
This Super.com deal was found by Cheapflights users on 5/15. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/811:06 am
PHL
- STL
1 stop28h 01m
Frontier
Deal found 5/15![Frontier logo]()
$96
This Trip.com deal was found by Cheapflights users on 5/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/145:55 am
EWR
- STL
1 stop12h 42m
Frontier
Deal found 5/15![Frontier logo]()
$99
This Super.com deal was found by Cheapflights users on 5/17. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1011:30 am
EWR
- STL
1 stop13h 19m
Frontier
Deal found 5/17![Frontier logo]()
$100
Find flight deals from Pennsylvania to Missouri
Keep the following information in mind while searching for Pennsylvania to Missouri flight deals. Data was last updated May 20, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $226 (Super.com) |
One-way from | $63 (Kiwi.com) |
Popular in | May |
Cheapest in | August |
Average price | $485 |
Good round-trip deal | $396 or less |
Good one-way deal | $191 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Pennsylvania to Missouri 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 May 20, 2026.
Use the filters below to find and compare flights from Pennsylvania to Missouri that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Tue 7/14
7:25 am-11:15 am
1 stop4h 50m
Lambert-St Louis
Tue 7/21
7:10 pm-10:20 pm
Nonstop2h 10m
$287
New YorkSt. Louis
JFK - STL
JFKSTL
New York John F Kennedy Intl
Wed 7/15
6:00 am-12:17 pm
1 stop7h 17m
Lambert-St Louis
Wed 7/22
6:00 am-12:00 pm
1 stop5h 00m
$313
Washington, D.C.St. Louis
IAD - STL
IADSTL
Washington, D.C. Dulles Intl
Fri 8/14
8:28 am-11:46 am
1 stop4h 18m
Lambert-St Louis
Tue 8/18
11:00 am-4:41 pm
1 stop4h 41m
$317
Washington, D.C.Kansas City
DCA - MCI
DCAMCI
Washington, D.C. Reagan-National
Thu 8/6
6:10 am-9:45 am
1 stop4h 35m
Kansas City
Tue 8/18
10:31 am-6:45 pm
1 stop7h 14m
$318
Washington, D.C.Kansas City
IAD - MCI
IADMCI
Washington, D.C. Dulles Intl
Thu 8/6
6:00 am-9:45 am
1 stop4h 45m
Kansas City
Tue 8/18
7:07 am-2:04 pm
1 stop5h 57m
$318
Quickest round-trip
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Thu 8/6
6:20 am-7:35 am
Nonstop2h 15m
Lambert-St Louis
Mon 8/10
7:05 pm-10:15 pm
Nonstop2h 10m
$319
New YorkSt. Louis
LGA - STL
LGASTL
New York LaGuardia
Sat 5/23
6:00 am-7:45 am
Nonstop2h 45m
Lambert-St Louis
Sun 5/24
5:40 am-9:00 am
Nonstop2h 20m
$324
New YorkSt. Louis
LGA - STL
LGASTL
New York LaGuardia
Tue 6/16
6:51 pm-8:46 pm
Nonstop2h 55m
Lambert-St Louis
Sat 7/4
3:39 pm-9:25 pm
1 stop4h 46m
$329
New YorkSt. Louis
LGA - STL
LGASTL
New York LaGuardia
Fri 6/26
8:55 am-10:45 am
Nonstop2h 50m
Lambert-St Louis
Tue 6/30
3:25 pm-6:55 pm
Nonstop2h 30m
$331
Washington, D.C.Kansas City
DCA - MCI
DCAMCI
Washington, D.C. Reagan-National
Wed 6/10
6:55 am-8:35 am
Nonstop2h 40m
Kansas City
Sat 6/13
1:50 pm-6:55 pm
1 stop4h 05m
$334
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Pennsylvania to Missouri
Have a flexible travel schedule? Discover the best time to fly to Missouri from Pennsylvania with our price prediction graph.
PHL-STL
EWR-STL
EWR-MCI
JFK-STL
JFK-MCI
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 Pennsylvania to Missouri
USPA-USMO
PHL-STL
EWR-STL
EWR-MCI
JFK-STL
What is the cheapest month to book a flight from Pennsylvania to Missouri?
Currently, November is the cheapest month in which you can book a flight from Pennsylvania to Missouri (average of $72). Flying from Pennsylvania to Missouri in September is currently the most expensive (average of $1,578). 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 PA to MO?
Find hourly flight availability from Pennsylvania to Missouri. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 20, 2026.
It’s optimal to fly from Pennsylvania to Missouri in the afternoon. By choosing this option you can save up to 13% on the cost of your flight, compared to a flight in the morning.
How much does it cost to fly round-trip from Pennsylvania to Missouri?
How far ahead should I book a flight from Pennsylvania to Missouri?
Booking 73 days in advance of your planned departure date is, on average, the best time to get cheap flights from Pennsylvania to Missouri. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest day to fly from Pennsylvania to Missouri?
Use this chart to determine the cheapest time to fly round-trip from Pennsylvania to Missouri. Price data was last updated on May 16, 2026.
Travelers seeking maximum savings on their Pennsylvania to Missouri flight should consider departing on Thursday at noon when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Missouri
Get insights into the airlines that provide service to Missouri. 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 Missouri. Reviews last updated May 20, 2026.
Read through reviews of airlines operating flights from Pennsylvania to Missouri, such as Southwest,Delta, andUnited Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.9
Entertainment
7.5
Crew
8.6
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
7.9
Entertainment
7.5
Crew
8.6
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
7.9
Entertainment
7.5
Crew
8.6
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
7.9
Entertainment
7.5
Crew
8.6
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
7.9
Entertainment
7.5
Crew
8.6
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
7.9
Entertainment
7.5
Crew
8.6
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Related info for your journey
Find useful and relevant information for your journey from Pennsylvania to Missouri. 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 Pennsylvania to Missouri
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Missouri by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Pennsylvania to Missouri by cabin class
Find flights from Pennsylvania to Missouri, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Pennsylvania and Missouri flights
Browse other Pennsylvania and Missouri flight options. Last updated on May 20, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Missouri
Find the right flight back to Pennsylvania after your stay in Missouri
Pennsylvania to Missouri flights
Consider these flights traveling from Pennsylvania to Missouri.
Top 7 airlines flying from Pennsylvania to Missouri
Discover the top 7 airlines that operate flights from Pennsylvania to Missouri. 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 May 20, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$93 | Average$178 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$128 | Average$237 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$170 | Average$394 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$196 | Average$409 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$219 | Average$390 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$235 | Average$423 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$358 | Average$433 | FlexibilityNo cancel fee | On-time62% |