$59+ 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 6/28. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — STL
Jun 7 — Jun 141
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 8, 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 8, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/7. 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 stop12h 38m
Frontier
Mon 6/85:27 pm
STL
- EWR
2 stops16h 04m
Frontier
Deal found 5/7![Frontier logo]()
$239
This Expedia deal was found by Cheapflights users on 5/7. 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 5/2610:29 pm
EWR
- STL
1 stop11h 26m
Frontier
Thu 6/46:33 pm
STL
- EWR
1 stop5h 45m
Frontier
Deal found 5/7![Frontier logo]()
$240
This Kiwi.com deal was found by Cheapflights users on 5/6. 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 8/185:55 am
EWR
- STL
1 stop12h 35m
Frontier
Sat 8/225:33 pm
STL
- EWR
1 stop26h 56m
Frontier
Deal found 5/6![Frontier logo]()
$241
This Kiwi.com deal was found by Cheapflights users on 5/6. 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 6/510:29 pm
EWR
- STL
1 stop11h 26m
Frontier
Mon 6/85:27 pm
STL
- EWR
1 stop6h 51m
Frontier
Deal found 5/6![Frontier logo]()
$243
This Kiwi.com deal was found by Cheapflights users on 5/6. 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 5/285:55 am
EWR
- STL
1 stop12h 38m
Frontier
Mon 6/15:27 pm
STL
- EWR
1 stop27h 02m
Frontier
Deal found 5/6![Frontier logo]()
$244
This CheapOair deal was found by Cheapflights users on 5/6. 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 5/238:35 pm
PHL
- STL
1 stop23h 48m
Frontier
Thu 5/286:33 pm
STL
- PHL
1 stop11h 39m
Frontier
Deal found 5/6![Frontier logo]()
$244
This Flightnetwork deal was found by Cheapflights users on 5/6. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/1210:29 pm
EWR
- STL
1 stop11h 23m
Frontier
Mon 6/154:17 pm
STL
- EWR
1 stop17h 13m
Frontier
Deal found 5/6![Frontier logo]()
$246
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/104:35 pm
PHL
- STL
1 stop25h 55m
Frontier
Fri 6/195:06 pm
STL
- PHL
2 stops54h 15m
Frontier
Deal found 5/4![Frontier logo]()
$249
This Frontier deal was found by Cheapflights users on 5/6. 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 6/1511:30 am
EWR
- STL
1 stop13h 19m
Frontier
Sat 6/205:06 pm
STL
- EWR
1 stop6h 59m
Frontier
Deal found 5/6![Frontier logo]()
$250
This Frontier deal was found by Cheapflights users on 5/6. 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.
Sat 6/135:34 pm
PHL
- STL
1 stop7h 15m
Frontier
Mon 6/224:17 pm
STL
- PHL
1 stop6h 26m
Frontier
Deal found 5/6![Frontier logo]()
$250
This Kiwi.com deal was found by Cheapflights users on 5/7. 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 6/1110:29 pm
EWR
- STL
1 stop11h 23m
Frontier
Mon 6/155:06 pm
STL
- EWR
1 stop27h 23m
Frontier
Deal found 5/7![Frontier logo]()
$254
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/35:04 pm
PHL
- STL
1 stop7h 53m
Frontier
Sun 6/76:33 pm
STL
- PHL
2 stops17h 47m
Frontier
Deal found 5/4![Frontier logo]()
$254
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 8, 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 8, 2026.
This Southwest deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/122:45 pm
PHL
- STL
Nonstop2h 20m
Southwest
Tue 8/256:40 pm
STL
- PHL
Nonstop2h 10m
Southwest
Deal found 5/3![Southwest logo]()
$257
This Delta deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/286:08 am
IAD
- STL
1 stop7h 12m
Delta
Tue 6/21:27 pm
STL
- IAD
1 stop4h 16m
Delta
Deal found 5/4![Delta logo]()
$271
This United Airlines deal was found by Cheapflights users on 5/6. 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 6/36:10 am
IAD
- STL
1 stop7h 01m
United Airlines
Wed 6/35:29 pm
STL
- IAD
1 stop6h 30m
United Airlines
Deal found 5/6![United Airlines logo]()
$277
This Delta deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/306:05 am
DCA
- STL
1 stop4h 24m
Delta
Wed 8/266:25 pm
STL
- DCA
1 stop3h 44m
Delta
Deal found 5/3![Delta logo]()
$271
This Southwest deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/266:20 am
PHL
- STL
Nonstop2h 25m
Southwest
Sat 5/306:55 pm
STL
- PHL
Nonstop2h 10m
Southwest
Deal found 5/4![Southwest logo]()
$274
This United Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/279:00 am
IAD
- STL
Nonstop2h 27m
United Airlines
Thu 5/288:43 am
STL
- IAD
Nonstop2h 12m
United Airlines
Deal found 5/5![United Airlines logo]()
$283
This Southwest deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/288:00 am
DCA
- STL
Nonstop2h 20m
Southwest
Sat 5/3010:55 am
STL
- DCA
2 stops7h 00m
Southwest
Deal found 5/4![Southwest logo]()
$280
This United Airlines deal was found by Cheapflights users on 5/6. 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 7/2810:07 pm
EWR
- STL
Nonstop2h 29m
United Airlines
Sat 8/16:01 am
STL
- EWR
Nonstop2h 29m
United Airlines
Deal found 5/6![United Airlines logo]()
$306
This Southwest deal was found by Cheapflights users on 5/7. 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 6/211:40 am
DCA
- STL
2 stops7h 20m
Southwest
Tue 6/165:55 pm
STL
- DCA
1 stop4h 50m
Southwest
Deal found 5/7![Southwest logo]()
$282
This Delta deal was found by Cheapflights users on 5/6. 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
Wed 6/34:25 pm
STL
- JFK
Nonstop2h 40m
Delta
Deal found 5/6![Delta logo]()
$313
This Southwest deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2711:35 am
PHL
- STL
1 stop7h 20m
Southwest
Mon 6/11:35 pm
STL
- PHL
Nonstop2h 10m
Southwest
Deal found 5/4![Southwest logo]()
$284
This Delta deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/286:45 pm
LGA
- STL
Nonstop2h 54m
Delta
Mon 6/15:45 pm
STL
- LGA
Nonstop2h 29m
Delta
Deal found 5/4![Delta logo]()
$315
This United Airlines deal was found by Cheapflights users on 5/7. 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 6/110:07 pm
EWR
- STL
Nonstop2h 28m
United Airlines
Sat 6/66:00 am
STL
- EWR
Nonstop2h 29m
United Airlines
Deal found 5/7![United Airlines logo]()
$315
This Southwest deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/175:05 pm
PHL
- STL
Nonstop2h 35m
Southwest
Mon 6/225:05 am
STL
- PHL
1 stop6h 00m
Southwest
Deal found 5/5![Southwest logo]()
$284
This Delta deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/283:10 pm
JFK
- STL
Nonstop2h 55m
Delta
Mon 6/14:25 pm
STL
- JFK
Nonstop2h 40m
Delta
Deal found 5/4![Delta logo]()
$315
This United Airlines deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/2610:17 pm
EWR
- STL
Nonstop2h 27m
United Airlines
Tue 6/306:01 am
STL
- EWR
Nonstop2h 29m
United Airlines
Deal found 5/4![United Airlines logo]()
$321
This Southwest deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/152:40 pm
DCA
- STL
Nonstop2h 15m
Southwest
Fri 9/183:55 pm
STL
- DCA
Nonstop2h 00m
Southwest
Deal found 5/4![Southwest logo]()
$287
This Delta deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/810:05 am
IAD
- STL
1 stop5h 33m
Delta
Fri 9/113:42 pm
STL
- IAD
1 stop7h 28m
Delta
Deal found 5/5![Delta logo]()
$317
This United Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/136:10 am
IAD
- STL
1 stop7h 01m
United Airlines
Tue 7/218:43 am
STL
- IAD
Nonstop2h 12m
United Airlines
Deal found 5/5![United Airlines logo]()
$341
This Southwest deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/88:00 am
DCA
- STL
Nonstop2h 10m
Southwest
Thu 6/113:15 pm
STL
- DCA
Nonstop2h 00m
Southwest
Deal found 5/4![Southwest logo]()
$290
This United Airlines deal was found by Cheapflights users on 5/7. 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 6/235:15 pm
IAD
- MCI
Nonstop2h 48m
United Airlines
Wed 7/811:25 am
MCI
- IAD
1 stop6h 37m
United Airlines
Deal found 5/7![United Airlines logo]()
$343
This Delta deal was found by Cheapflights users on 5/7. 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 6/16:30 pm
JFK
- STL
1 stop6h 29m
Delta
Sat 6/63:13 pm
STL
- JFK
1 stop6h 50m
Delta
Deal found 5/7![Delta logo]()
$345
This Southwest deal was found by Cheapflights users on 5/7. 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 6/911:45 am
DCA
- STL
1 stop4h 05m
Southwest
Thu 6/115:00 am
STL
- DCA
1 stop6h 20m
Southwest
Deal found 5/7![Southwest logo]()
$300
This Delta deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/83:02 pm
IAD
- MCI
1 stop6h 44m
Delta
Sat 6/131:17 pm
MCI
- IAD
1 stop5h 41m
Delta
Deal found 5/5![Delta logo]()
$347
This United Airlines deal was found by Cheapflights users on 5/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/55:15 pm
IAD
- MCI
Nonstop2h 48m
United Airlines
Sun 8/96:00 am
MCI
- IAD
1 stop4h 52m
United Airlines
Deal found 5/7![United Airlines logo]()
$350
This Southwest deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/2312:00 pm
LGA
- STL
Nonstop2h 40m
Southwest
Fri 7/37:55 pm
STL
- LGA
Nonstop2h 25m
Southwest
Deal found 5/5![Southwest logo]()
$306
This United Airlines deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/245:55 pm
IAD
- STL
Nonstop2h 31m
United Airlines
Wed 5/275:29 pm
STL
- IAD
1 stop6h 30m
United Airlines
Deal found 5/3![United Airlines logo]()
$366
This Southwest deal was found by Cheapflights users on 5/7. 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 7/16:00 am
LGA
- STL
1 stop4h 35m
Southwest
Wed 7/15:55 pm
STL
- LGA
1 stop4h 00m
Southwest
Deal found 5/7![Southwest logo]()
$308
This Delta deal was found by Cheapflights users on 5/6. 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 5/287:30 am
LGA
- MCI
Nonstop3h 15m
Delta
Mon 6/16:50 pm
MCI
- LGA
Nonstop2h 56m
Delta
Deal found 5/6![Delta logo]()
$373
This United Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/210:07 pm
EWR
- STL
Nonstop2h 29m
United Airlines
Wed 6/36:00 am
STL
- EWR
Nonstop2h 29m
United Airlines
Deal found 5/5![United Airlines logo]()
$373
Last-minute flights from Pennsylvania to MissouriDiscover last-minute flight deals from Pennsylvania to Missouri. Data last updated May 8, 2026 and is based on user searches.
Discover last-minute flight deals from Pennsylvania to Missouri. Data last updated May 8, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 5/6. 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 5/238:35 pm
PHL
- STL
1 stop23h 48m
Frontier
Thu 5/286:33 pm
STL
- PHL
1 stop11h 39m
Frontier
Deal found 5/6![Frontier logo]()
$244
This Expedia deal was found by Cheapflights users on 5/7. 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 5/2610:29 pm
EWR
- STL
1 stop11h 26m
Frontier
Thu 6/46:33 pm
STL
- EWR
1 stop5h 45m
Frontier
Deal found 5/7![Frontier logo]()
$240
This Kiwi.com deal was found by Cheapflights users on 5/6. 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 5/285:55 am
EWR
- STL
1 stop12h 38m
Frontier
Mon 6/15:27 pm
STL
- EWR
1 stop27h 02m
Frontier
Deal found 5/6![Frontier logo]()
$244
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/35:04 pm
PHL
- STL
1 stop7h 53m
Frontier
Sun 6/76:33 pm
STL
- PHL
2 stops17h 47m
Frontier
Deal found 5/4![Frontier logo]()
$254
This Kiwi.com deal was found by Cheapflights users on 5/7. 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 stop12h 38m
Frontier
Mon 6/85:27 pm
STL
- EWR
2 stops16h 04m
Frontier
Deal found 5/7![Frontier logo]()
$239
This Kiwi.com deal was found by Cheapflights users on 5/6. 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 6/510:29 pm
EWR
- STL
1 stop11h 26m
Frontier
Mon 6/85:27 pm
STL
- EWR
1 stop6h 51m
Frontier
Deal found 5/6![Frontier logo]()
$243
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/104:35 pm
PHL
- STL
1 stop25h 55m
Frontier
Fri 6/195:06 pm
STL
- PHL
2 stops54h 15m
Frontier
Deal found 5/4![Frontier logo]()
$249
This Kiwi.com deal was found by Cheapflights users on 5/7. 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 6/1110:29 pm
EWR
- STL
1 stop11h 23m
Frontier
Mon 6/155:06 pm
STL
- EWR
1 stop27h 23m
Frontier
Deal found 5/7![Frontier logo]()
$254
This Flightnetwork deal was found by Cheapflights users on 5/6. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/1210:29 pm
EWR
- STL
1 stop11h 23m
Frontier
Mon 6/154:17 pm
STL
- EWR
1 stop17h 13m
Frontier
Deal found 5/6![Frontier logo]()
$246
This Frontier deal was found by Cheapflights users on 5/6. 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.
Sat 6/135:34 pm
PHL
- STL
1 stop7h 15m
Frontier
Mon 6/224:17 pm
STL
- PHL
1 stop6h 26m
Frontier
Deal found 5/6![Frontier logo]()
$250
This Frontier deal was found by Cheapflights users on 5/6. 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 6/1511:30 am
EWR
- STL
1 stop13h 19m
Frontier
Sat 6/205:06 pm
STL
- EWR
1 stop6h 59m
Frontier
Deal found 5/6![Frontier logo]()
$250
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/168:30 am
PHL
- STL
1 stop10h 00m
Frontier
Tue 6/236:31 pm
STL
- PHL
2 stops52h 50m
Frontier
Deal found 5/4![Frontier logo]()
$255
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 8, 2026.
Search for one-way flight options from Pennsylvania to Missouri. Find affordable one-way fares based on user searches. Data last updated May 8, 2026.
This Trip.com deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/287:30 am
IAD
- STL
1 stop11h 00m
Frontier
Deal found 5/5![Frontier logo]()
$59
This Trip.com deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/65:55 am
EWR
- MCI
1 stop12h 34m
Frontier
Deal found 5/5![Frontier logo]()
$59
This Trip.com deal was found by Cheapflights users on 5/6. 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 6/27:45 am
IAD
- STL
1 stop10h 48m
Frontier
Deal found 5/6![Frontier logo]()
$60
This Trip.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/105:58 am
EWR
- MCI
1 stop12h 23m
Frontier
Deal found 5/4![Frontier logo]()
$60
This Kiwi.com deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/148:57 pm
IAD
- STL
1 stop12h 55m
Frontier
Deal found 5/5![Frontier logo]()
$61
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/410:29 pm
EWR
- STL
1 stop11h 26m
Frontier
Deal found 5/4![Frontier logo]()
$63
This Kiwi.com deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.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 5/5![Frontier logo]()
$65
This Kiwi.com deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/25:55 am
EWR
- STL
1 stop28h 00m
Frontier
Deal found 5/5![Frontier logo]()
$65
This Kiwi.com deal was found by Cheapflights users on 5/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/317:45 am
IAD
- STL
1 stop26h 10m
Frontier
Deal found 5/7![Frontier logo]()
$66
This Kiwi.com deal was found by Cheapflights users on 5/6. 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 8/207:30 am
IAD
- STL
1 stop11h 00m
Frontier
Deal found 5/6![Frontier logo]()
$67
This Super.com deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/2411:07 am
IAD
- STL
1 stop7h 26m
Frontier
Deal found 5/3![Frontier logo]()
$70
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/15:55 am
EWR
- MCI
1 stop12h 34m
Frontier
Deal found 5/4![Frontier logo]()
$70
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 8, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $239 (Kiwi.com) |
One-way from | $59 (Trip.com) |
Popular in | December |
Cheapest in | September |
Average price | $450 |
Good round-trip deal | $374 or less |
Good one-way deal | $178 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 8, 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
Wed 8/12
2:45 pm-4:05 pm
Nonstop2h 20m
Lambert-St Louis
Tue 8/25
6:40 pm-9:50 pm
Nonstop2h 10m
$257
Washington, D.C.St. Louis
IAD - STL
IADSTL
Washington, D.C. Dulles Intl
Thu 5/28
6:08 am-12:20 pm
1 stop7h 12m
Lambert-St Louis
Tue 6/2
1:27 pm-6:43 pm
1 stop4h 16m
$271
Washington, D.C.St. Louis
DCA - STL
DCASTL
Washington, D.C. Reagan-National
Sat 5/30
6:05 am-9:29 am
1 stop4h 24m
Lambert-St Louis
Wed 8/26
6:25 pm-11:09 pm
1 stop3h 44m
$271
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Tue 5/26
6:20 am-7:45 am
Nonstop2h 25m
Lambert-St Louis
Sat 5/30
6:55 pm-10:05 pm
Nonstop2h 10m
$274
Washington, D.C.St. Louis
IAD - STL
IADSTL
Washington, D.C. Dulles Intl
Wed 6/3
6:10 am-12:11 pm
1 stop7h 01m
Lambert-St Louis
Wed 6/3
5:29 pm-12:59 am
1 stop6h 30m
$277
Washington, D.C.St. Louis
DCA - STL
DCASTL
Washington, D.C. Reagan-National
Thu 5/28
8:00 am-9:20 am
Nonstop2h 20m
Lambert-St Louis
Sat 5/30
10:55 am-6:55 pm
2 stops7h 00m
$280
Washington, D.C.St. Louis
DCA - STL
DCASTL
Washington, D.C. Reagan-National
Tue 6/2
11:40 am-6:00 pm
2 stops7h 20m
Lambert-St Louis
Tue 6/16
5:55 pm-11:45 pm
1 stop4h 50m
$282
Washington, D.C.St. Louis
IAD - STL
IADSTL
Washington, D.C. Dulles Intl
Wed 5/27
9:00 am-10:27 am
Nonstop2h 27m
Lambert-St Louis
Thu 5/28
8:43 am-11:55 am
Nonstop2h 12m
$283
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Wed 5/27
11:35 am-5:55 pm
1 stop7h 20m
Lambert-St Louis
Mon 6/1
1:35 pm-4:45 pm
Nonstop2h 10m
$284
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Wed 6/17
5:05 pm-6:40 pm
Nonstop2h 35m
Lambert-St Louis
Mon 6/22
5:05 am-12:05 pm
1 stop6h 00m
$284
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.
EWR-STL
PHL-STL
IAD-STL
EWR-MCI
DCA-STL
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
EWR-STL
PHL-STL
IAD-STL
EWR-MCI
How far ahead should I book a flight from Pennsylvania to Missouri?
Booking 37 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 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 May is currently the most expensive (average of $1,052). 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 8, 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.
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 2, 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.
How much does it cost to fly round-trip from Pennsylvania to Missouri?
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 8, 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.
Crew
8.6
Food
7.0
Comfort
8.0
Boarding
8.1
Overall
7.9
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Food
7.0
Comfort
8.0
Boarding
8.1
Overall
7.9
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Food
7.0
Comfort
8.0
Boarding
8.1
Overall
7.9
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Food
7.0
Comfort
8.0
Boarding
8.1
Overall
7.9
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Food
7.0
Comfort
8.0
Boarding
8.1
Overall
7.9
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Food
7.0
Comfort
8.0
Boarding
8.1
Overall
7.9
Entertainment
7.5
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 8, 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 8, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$93 | Average$178 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$128 | Average$236 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$170 | Average$399 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$219 | Average$387 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$221 | Average$419 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$248 | Average$402 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$358 | Average$433 | FlexibilityNo cancel fee | On-time62% |