$81+ Cheap flights from New Hampshire to St. Louis (STL)
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 6/9. Fares are subject to change and may not be available on all flights or dates of travel.
MHT — STL
Jun 15 — Jun 221
Round-trip
1 adult, Economy
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Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Cheapest flights from New Hampshire to St. LouisExplore the most affordable flight options available from New Hampshire to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 16, 2026.
Explore the most affordable flight options available from New Hampshire to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 16, 2026.
This United Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/235:00 pm
PWM
- STL
1 stop5h 30m
United Airlines
Tue 6/301:13 pm
STL
- PWM
1 stop7h 28m
United Airlines
Deal found 5/13![United Airlines logo]()
$319
This Kiwi.com deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/109:52 am
PWM
- STL
1 stop15h 07m
Multiple Airlines
Mon 7/134:52 pm
STL
- PWM
2 stops22h 07m
Multiple Airlines
Deal found 5/14![Multiple Airlines logo]()
$327
This Southwest deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/225:45 am
MHT
- STL
1 stop6h 45m
Southwest
Tue 7/285:40 am
STL
- MHT
1 stop4h 10m
Southwest
Deal found 5/12![Southwest logo]()
$327
This American Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/2410:27 am
MHT
- STL
1 stop7h 31m
American Airlines
Wed 7/16:15 am
STL
- MHT
1 stop7h 11m
American Airlines
Deal found 5/12![American Airlines logo]()
$333
This Kiwi.com deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/88:44 am
BOS
- STL
2 stops16h 13m
Frontier
Thu 6/116:31 pm
STL
- BOS
1 stop29h 56m
Frontier
Deal found 5/13![Frontier logo]()
$342
This American Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/171:36 pm
PWM
- STL
1 stop8h 16m
American Airlines
Mon 6/226:00 am
STL
- PWM
1 stop5h 39m
American Airlines
Deal found 5/12![American Airlines logo]()
$343
This Southwest deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/185:35 am
BOS
- STL
Nonstop2h 50m
Southwest
Sat 9/1211:40 am
STL
- BOS
Nonstop2h 35m
Southwest
Deal found 5/12![Southwest logo]()
$345
This Kiwi.com deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” 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 7/2111:05 am
BOS
- STL
2 stops22h 52m
Frontier
Wed 7/224:52 pm
STL
- BOS
1 stop7h 31m
Frontier
Deal found 5/11![Frontier logo]()
$346
This American Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/25:11 pm
BOS
- STL
Nonstop3h 10m
American Airlines
Tue 6/910:45 am
STL
- BOS
1 stop4h 57m
American Airlines
Deal found 5/12![American Airlines logo]()
$347
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 8/126:15 pm
MHT
- STL
1 stop4h 25m
Southwest
Sat 8/155:45 am
STL
- MHT
1 stop4h 30m
Southwest
Deal found 5/16![Southwest logo]()
$347
This Kiwi.com deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/278:43 am
BOS
- STL
2 stops49h 09m
Frontier
Sun 7/56:33 pm
STL
- BOS
1 stop12h 13m
Frontier
Deal found 5/12![Frontier logo]()
$349
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/196:00 am
BOS
- STL
1 stop12h 33m
Frontier
Sun 5/246:33 pm
STL
- BOS
1 stop5h 51m
Frontier
Deal found 5/16![Frontier logo]()
$350
Best flights from New Hampshire to St. LouisDiscover carefully curated flight deals from New Hampshire to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 16, 2026.
Discover carefully curated flight deals from New Hampshire to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 16, 2026.
This American Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/245:41 am
MHT
- STL
1 stop5h 31m
American Airlines
Wed 7/15:00 pm
STL
- MHT
1 stop5h 51m
American Airlines
Deal found 5/13![American Airlines logo]()
$345
This Southwest deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/45:35 am
BOS
- STL
Nonstop2h 50m
Southwest
Mon 6/85:20 pm
STL
- BOS
1 stop5h 45m
Southwest
Deal found 5/12![Southwest logo]()
$363
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 6/102:37 pm
MHT
- STL
2 stops9h 58m
United Airlines
Sat 6/131:13 pm
STL
- MHT
2 stops9h 46m
United Airlines
Deal found 5/15![United Airlines logo]()
$397
This Delta deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/109:15 am
BOS
- STL
1 stop4h 54m
Delta
Sat 6/134:00 pm
STL
- BOS
1 stop6h 14m
Delta
Deal found 5/12![Delta logo]()
$404
This Southwest deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/237:10 pm
PWM
- STL
1 stop4h 50m
Southwest
Tue 6/303:15 pm
STL
- PWM
2 stops6h 40m
Southwest
Deal found 5/12![Southwest logo]()
$382
This Southwest deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” 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 7/15:50 am
BOS
- STL
Nonstop2h 55m
Southwest
Wed 7/11:15 pm
STL
- BOS
Nonstop2h 35m
Southwest
Deal found 5/11![Southwest logo]()
$384
This American Airlines deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/196:07 pm
MHT
- STL
1 stop7h 09m
American Airlines
Mon 6/225:40 pm
STL
- MHT
1 stop4h 59m
American Airlines
Deal found 5/11![American Airlines logo]()
$427
This United Airlines deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” 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 9/12:46 pm
MHT
- STL
2 stops8h 14m
United Airlines
Wed 9/28:00 am
STL
- MHT
2 stops10h 00m
United Airlines
Deal found 5/11![United Airlines logo]()
$427
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/106:55 am
MHT
- STL
1 stop6h 40m
Southwest
Sat 6/139:30 am
STL
- MHT
1 stop5h 55m
Southwest
Deal found 5/15![Southwest logo]()
$387
This United Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/245:15 am
PWM
- STL
2 stops7h 56m
United Airlines
Mon 6/291:13 pm
STL
- PWM
1 stop7h 28m
United Airlines
Deal found 5/12![United Airlines logo]()
$438
This Southwest deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/229:10 am
MHT
- STL
2 stops9h 15m
Southwest
Tue 7/281:45 pm
STL
- MHT
2 stops8h 00m
Southwest
Deal found 5/12![Southwest logo]()
$392
This Southwest deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” 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 6/87:00 pm
MHT
- STL
1 stop4h 50m
Southwest
Mon 6/155:40 am
STL
- MHT
1 stop4h 10m
Southwest
Deal found 5/11![Southwest logo]()
$397
This Southwest deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/177:10 pm
PWM
- STL
1 stop4h 50m
Southwest
Mon 6/223:35 pm
STL
- PWM
2 stops7h 30m
Southwest
Deal found 5/12![Southwest logo]()
$407
This Southwest deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” 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 6/285:50 am
BOS
- STL
Nonstop2h 55m
Southwest
Tue 6/305:40 am
STL
- BOS
1 stop5h 35m
Southwest
Deal found 5/11![Southwest logo]()
$409
This Southwest deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” 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 6/145:50 am
BOS
- STL
Nonstop2h 55m
Southwest
Tue 6/165:40 am
STL
- BOS
1 stop4h 15m
Southwest
Deal found 5/11![Southwest logo]()
$409
This Southwest deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” 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 6/85:35 am
BOS
- STL
Nonstop2h 50m
Southwest
Mon 6/154:35 pm
STL
- BOS
2 stops6h 30m
Southwest
Deal found 5/11![Southwest logo]()
$422
This Southwest deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/187:40 am
PWM
- STL
1 stop7h 30m
Southwest
Fri 6/194:25 pm
STL
- PWM
2 stops6h 40m
Southwest
Deal found 5/12![Southwest logo]()
$432
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/185:35 am
PWM
- STL
1 stop6h 05m
Southwest
Sat 7/253:45 pm
STL
- PWM
2 stops6h 55m
Southwest
Deal found 5/15![Southwest logo]()
$432
This Southwest deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/23:10 pm
PWM
- STL
2 stops6h 50m
Southwest
Sun 7/56:45 pm
STL
- PWM
1 stop4h 20m
Southwest
Deal found 5/12![Southwest logo]()
$432
This Southwest deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/175:35 am
PWM
- STL
1 stop6h 15m
Southwest
Mon 7/273:35 pm
STL
- PWM
2 stops7h 30m
Southwest
Deal found 5/14![Southwest logo]()
$432
This Southwest deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/115:20 pm
PWM
- STL
1 stop6h 50m
Southwest
Thu 6/185:20 pm
STL
- PWM
1 stop5h 45m
Southwest
Deal found 5/14![Southwest logo]()
$433
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.
Fri 5/293:15 pm
MHT
- STL
1 stop6h 00m
Southwest
Sun 5/315:25 am
STL
- MHT
1 stop4h 15m
Southwest
Deal found 5/16![Southwest logo]()
$437
This Southwest deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” 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 6/145:30 am
PWM
- STL
1 stop6h 35m
Southwest
Tue 6/164:00 pm
STL
- PWM
1 stop4h 30m
Southwest
Deal found 5/11![Southwest logo]()
$439
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/105:35 am
PWM
- STL
2 stops13h 55m
Southwest
Sun 7/126:45 pm
STL
- PWM
1 stop4h 20m
Southwest
Deal found 5/15![Southwest logo]()
$458
This Southwest deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” 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 7/45:45 am
PWM
- STL
2 stops7h 20m
Southwest
Sat 7/41:30 pm
STL
- PWM
1 stop4h 40m
Southwest
Deal found 5/11![Southwest logo]()
$461
This Southwest deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/65:50 pm
BOS
- STL
Nonstop2h 55m
Southwest
Mon 8/106:55 pm
STL
- BOS
Nonstop2h 35m
Southwest
Deal found 5/12![Southwest logo]()
$461
This Southwest deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/51:20 pm
BOS
- STL
2 stops8h 30m
Southwest
Tue 6/93:15 pm
STL
- BOS
2 stops7h 05m
Southwest
Deal found 5/14![Southwest logo]()
$465
This Southwest deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” 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 6/215:50 am
BOS
- STL
Nonstop2h 55m
Southwest
Fri 6/265:35 pm
STL
- BOS
1 stop5h 35m
Southwest
Deal found 5/11![Southwest logo]()
$471
This Southwest deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” 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 8/145:55 pm
BOS
- STL
1 stop5h 10m
Southwest
Sun 8/168:20 am
STL
- BOS
Nonstop2h 35m
Southwest
Deal found 5/11![Southwest logo]()
$471
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.
Mon 6/155:35 am
BOS
- STL
Nonstop2h 50m
Southwest
Mon 6/225:20 pm
STL
- BOS
1 stop5h 45m
Southwest
Deal found 5/16![Southwest logo]()
$471
Last-minute flights from New Hampshire to St. LouisDiscover last-minute flight deals from New Hampshire to St. Louis. Data last updated May 16, 2026 and is based on user searches.
Discover last-minute flight deals from New Hampshire to St. Louis. Data last updated May 16, 2026 and is based on user searches.
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/196:00 am
BOS
- STL
1 stop12h 33m
Frontier
Sun 5/246:33 pm
STL
- BOS
1 stop5h 51m
Frontier
Deal found 5/16![Frontier logo]()
$350
This Kiwi.com deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/2912:01 pm
BOS
- STL
1 stop21h 54m
Frontier
Fri 6/55:27 pm
STL
- BOS
2 stops16h 39m
Frontier
Deal found 5/12![Frontier logo]()
$354
This American Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/25:11 pm
BOS
- STL
Nonstop3h 10m
American Airlines
Tue 6/910:45 am
STL
- BOS
1 stop4h 57m
American Airlines
Deal found 5/12![American Airlines logo]()
$347
This American Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/47:00 am
BOS
- STL
Nonstop3h 09m
American Airlines
Tue 6/97:51 pm
STL
- BOS
Nonstop2h 45m
American Airlines
Deal found 5/13![American Airlines logo]()
$345
This Southwest deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/45:35 am
BOS
- STL
Nonstop2h 50m
Southwest
Mon 6/87:55 pm
STL
- BOS
Nonstop2h 30m
Southwest
Deal found 5/12![Southwest logo]()
$353
This Kiwi.com deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/88:44 am
BOS
- STL
2 stops16h 13m
Frontier
Thu 6/116:31 pm
STL
- BOS
1 stop29h 56m
Frontier
Deal found 5/13![Frontier logo]()
$342
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.
Sun 6/146:00 am
BOS
- STL
1 stop27h 52m
Frontier
Tue 6/166:31 pm
STL
- BOS
2 stops15h 34m
Frontier
Deal found 5/15![Frontier logo]()
$351
This American Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/171:36 pm
PWM
- STL
1 stop8h 16m
American Airlines
Mon 6/226:00 am
STL
- PWM
1 stop5h 39m
American Airlines
Deal found 5/12![American Airlines logo]()
$343
This United Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/235:00 pm
PWM
- STL
1 stop5h 30m
United Airlines
Tue 6/301:13 pm
STL
- PWM
1 stop7h 28m
United Airlines
Deal found 5/13![United Airlines logo]()
$319
This American Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/2410:27 am
MHT
- STL
1 stop7h 31m
American Airlines
Wed 7/16:15 am
STL
- MHT
1 stop7h 11m
American Airlines
Deal found 5/12![American Airlines logo]()
$333
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 6/245:50 am
BOS
- STL
Nonstop2h 55m
Southwest
Tue 6/303:15 pm
STL
- BOS
2 stops7h 05m
Southwest
Deal found 5/16![Southwest logo]()
$352
This Kiwi.com deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/278:43 am
BOS
- STL
2 stops49h 09m
Frontier
Sun 7/56:33 pm
STL
- BOS
1 stop12h 13m
Frontier
Deal found 5/12![Frontier logo]()
$349
One-way flights from New Hampshire to St. LouisSearch for one-way flight options from New Hampshire to St. Louis. Find affordable one-way fares based on user searches. Data last updated May 16, 2026.
Search for one-way flight options from New Hampshire to St. Louis. Find affordable one-way fares based on user searches. Data last updated May 16, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/99:10 am
BOS
- STL
1 stop9h 20m
Frontier
Deal found 5/14![Frontier logo]()
$81
This Kiwi.com deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” 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 6/26:00 am
BOS
- STL
1 stop12h 33m
Frontier
Deal found 5/11![Frontier logo]()
$82
This Super.com deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/169:10 am
BOS
- STL
1 stop9h 20m
Frontier
Deal found 5/14![Frontier logo]()
$100
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/811:05 am
BOS
- STL
1 stop13h 54m
Frontier
Deal found 5/16![Frontier logo]()
$101
This Kiwi.com deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/116:00 am
BOS
- STL
1 stop27h 57m
Frontier
Deal found 5/13![Frontier logo]()
$104
This Super.com deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/129:14 am
BOS
- STL
1 stop9h 23m
Frontier
Deal found 5/13![Frontier logo]()
$110
This Frontier deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/116:00 am
BOS
- STL
1 stop12h 30m
Frontier
Deal found 5/13![Frontier logo]()
$111
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/2511:05 am
BOS
- STL
1 stop13h 54m
Frontier
Deal found 5/15![Frontier logo]()
$115
This Super.com deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/286:00 am
BOS
- STL
1 stop12h 33m
Frontier
Deal found 5/13![Frontier logo]()
$116
This Kiwi.com deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/1212:01 pm
BOS
- STL
1 stop21h 51m
Frontier
Deal found 5/14![Frontier logo]()
$119
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/311:05 am
BOS
- STL
1 stop13h 54m
Frontier
Deal found 5/16![Frontier logo]()
$120
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/3111:05 am
BOS
- STL
1 stop13h 54m
Frontier
Deal found 5/16![Frontier logo]()
$121
Find flight deals from New Hampshire to St. Louis
Keep the following information in mind while searching for New Hampshire to St. Louis flight deals. Data was last updated May 16, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $319 (United Airlines) |
One-way from | $81 (Kiwi.com) |
Popular in | July |
Cheapest in | August |
Average price | $487 |
Cheapflights Fare Finder
Customize your flight search to find flights from New Hampshire to St. Louis 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 16, 2026.
Use the filters below to find and compare flights from New Hampshire to St. Louis that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
ManchesterSt. Louis
MHT - STL
MHTSTL
Manchester
Wed 6/24
5:41 am-10:12 am
1 stop5h 31m
Lambert-St Louis
Wed 7/1
5:00 pm-11:51 pm
1 stop5h 51m
$345
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Thu 6/4
5:35 am-7:25 am
Nonstop2h 50m
Lambert-St Louis
Mon 6/8
5:20 pm-12:05 am
1 stop5h 45m
$363
PortlandSt. Louis
PWM - STL
PWMSTL
Portland
Tue 6/23
7:10 pm-11:00 pm
1 stop4h 50m
Lambert-St Louis
Tue 6/30
3:15 pm-10:55 pm
2 stops6h 40m
$382
Quickest round-trip
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Wed 7/1
5:50 am-7:45 am
Nonstop2h 55m
Lambert-St Louis
Wed 7/1
1:15 pm-4:50 pm
Nonstop2h 35m
$384
ManchesterSt. Louis
MHT - STL
MHTSTL
Manchester
Wed 6/10
6:55 am-12:35 pm
1 stop6h 40m
Lambert-St Louis
Sat 6/13
9:30 am-4:25 pm
1 stop5h 55m
$387
ManchesterSt. Louis
MHT - STL
MHTSTL
Manchester
Wed 7/22
9:10 am-5:25 pm
2 stops9h 15m
Lambert-St Louis
Tue 7/28
1:45 pm-10:45 pm
2 stops8h 00m
$392
ManchesterSt. Louis
MHT - STL
MHTSTL
Manchester
Wed 6/10
2:37 pm-11:35 pm
2 stops9h 58m
Lambert-St Louis
Sat 6/13
1:13 pm-11:59 pm
2 stops9h 46m
$397
ManchesterSt. Louis
MHT - STL
MHTSTL
Manchester
Mon 6/8
7:00 pm-10:50 pm
1 stop4h 50m
Lambert-St Louis
Mon 6/15
5:40 am-10:50 am
1 stop4h 10m
$397
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Wed 6/10
9:15 am-1:09 pm
1 stop4h 54m
Lambert-St Louis
Sat 6/13
4:00 pm-11:14 pm
1 stop6h 14m
$404
PortlandSt. Louis
PWM - STL
PWMSTL
Portland
Wed 6/17
7:10 pm-11:00 pm
1 stop4h 50m
Lambert-St Louis
Mon 6/22
3:35 pm-12:05 am
2 stops7h 30m
$407
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from New Hampshire to St. Louis
Have a flexible travel schedule? Discover the best time to fly to St. Louis from New Hampshire with our price prediction graph.
MHT-STL
BOS-STL
PWM-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 New Hampshire to St. Louis
USNH-STL
MHT-STL
BOS-STL
PWM-STL
What is the cheapest month to book a flight from New Hampshire to St. Louis?
Currently, August is the cheapest month in which you can book a flight from New Hampshire to St. Louis (average of $179). Flying from New Hampshire to St. Louis in March is currently the most expensive (average of $448). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
How much does it cost to fly round-trip from New Hampshire to St. Louis?
Related info for your journey
Find useful and relevant information for your journey from New Hampshire to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsEdwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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St. Louis flight routes
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Alternative routes for New Hampshire to St. Louis
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to St. Louis by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from New Hampshire to St. Louis by cabin class
Find flights from New Hampshire to St. Louis, based on your preferred cabin class, be it economy, premium economy, business, or first class.
New Hampshire and St. Louis flights
Browse other New Hampshire and St. Louis flight options. Last updated on May 16, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to St. Louis
Explore flights to St. Louis departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on May 16, 2026.
New Hampshire to St. Louis flights
Consider these flights traveling from New Hampshire to St. Louis.
Top 2 airlines flying from New Hampshire to St. Louis
Discover the top 2 airlines that operate flights from New Hampshire to St. Louis. 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 16, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$200 | Average$436 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$274 | Average$392 | FlexibilityNo cancel fee | On-time71% |