$99+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
MHT — STL
Jul 18 — Jul 251
Round-trip
1 adult, Economy
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Find cheap flights from New Hampshire to St. Louis with Cheapflights
1. Tell us where you want to go
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from New Hampshire to St. Louis
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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 June 18, 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 June 18, 2026.
This Delta deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/186:05 am
PWM
- STL
1 stop6h 41m
Delta
Wed 8/263:39 pm
STL
- PWM
1 stop6h 34m
Delta
Deal found 6/14![Delta logo]()
$333
This Southwest deal was found by Cheapflights users on 6/16. 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 7/86:15 pm
MHT
- STL
1 stop5h 15m
Southwest
Wed 7/155:40 am
STL
- MHT
1 stop4h 10m
Southwest
Deal found 6/16![Southwest logo]()
$333
This Delta deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:05 am
PWM
- STL
1 stop6h 41m
Delta
Sun 9/67:00 am
STL
- PWM
1 stop5h 07m
Delta
Deal found 6/14![Delta logo]()
$336
This United Airlines deal was found by Cheapflights users on 6/15. 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.
Tue 6/305:00 pm
PWM
- STL
1 stop5h 26m
United Airlines
Sat 7/43:22 pm
STL
- PWM
1 stop5h 19m
United Airlines
Deal found 6/15![United Airlines logo]()
$339
This Frontier deal was found by Cheapflights users on 6/18. 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 10/229:15 am
BOS
- STL
1 stop11h 24m
Frontier
Sun 10/258:34 pm
STL
- BOS
1 stop10h 46m
Frontier
Deal found 6/18![Frontier logo]()
$346
This Southwest deal was found by Cheapflights users on 6/16. 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 7/1511:35 am
BOS
- STL
2 stops7h 50m
Southwest
Tue 7/213:15 pm
STL
- BOS
2 stops7h 10m
Southwest
Deal found 6/16![Southwest logo]()
$347
This Southwest deal was found by Cheapflights users on 6/17. 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 10/85:25 am
BOS
- STL
Nonstop3h 00m
Southwest
Tue 10/1312:40 pm
STL
- BOS
1 stop10h 10m
Southwest
Deal found 6/17![Southwest logo]()
$348
This Kiwi.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/710:04 am
BOS
- STL
2 stops23h 53m
Frontier
Thu 7/96:34 pm
STL
- BOS
1 stop12h 12m
Frontier
Deal found 6/16![Frontier logo]()
$350
This Frontier deal was found by Cheapflights users on 6/18. 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 6/256:00 am
BOS
- STL
1 stop12h 30m
Frontier
Sat 6/275:06 pm
STL
- BOS
1 stop7h 21m
Frontier
Deal found 6/18![Frontier logo]()
$351
This Delta deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/186:05 am
PWM
- STL
1 stop6h 41m
Delta
Sat 8/227:05 am
STL
- PWM
1 stop7h 53m
Delta
Deal found 6/14![Delta logo]()
$354
This Frontier deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/186:00 am
BOS
- STL
1 stop12h 30m
Frontier
Sat 6/205:06 pm
STL
- BOS
1 stop7h 21m
Frontier
Deal found 6/17![Frontier logo]()
$354
This Kiwi.com deal was found by Cheapflights users on 6/18. 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.
Thu 10/812:34 pm
BOS
- STL
2 stops22h 06m
Multiple Airlines
Sun 10/1810:35 am
STL
- BOS
1 stop23h 17m
Multiple Airlines
Deal found 6/18![Multiple Airlines logo]()
$355
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 June 18, 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 June 18, 2026.
This Southwest deal was found by Cheapflights users on 6/16. 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 7/86:15 pm
MHT
- STL
1 stop5h 15m
Southwest
Wed 7/155:40 am
STL
- MHT
1 stop4h 10m
Southwest
Deal found 6/16![Southwest logo]()
$333
This American Airlines deal was found by Cheapflights users on 6/13. 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 11/185:20 pm
MHT
- STL
1 stop5h 22m
American Airlines
Sun 11/226:17 pm
STL
- MHT
1 stop4h 39m
American Airlines
Deal found 6/13![American Airlines logo]()
$380
This United Airlines deal was found by Cheapflights users on 6/13. 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.
Wed 11/181:30 pm
MHT
- STL
2 stops10h 55m
United Airlines
Sun 11/221:27 pm
STL
- MHT
2 stops9h 32m
United Airlines
Deal found 6/13![United Airlines logo]()
$390
This Delta deal was found by Cheapflights users on 6/18. 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 10/236:00 am
PWM
- STL
1 stop5h 48m
Delta
Mon 10/266:00 am
STL
- PWM
1 stop5h 18m
Delta
Deal found 6/18![Delta logo]()
$401
This Southwest deal was found by Cheapflights users on 6/16. 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 9/95:45 am
PWM
- STL
2 stops9h 10m
Southwest
Thu 9/104:15 pm
STL
- PWM
1 stop5h 10m
Southwest
Deal found 6/16![Southwest logo]()
$359
This Southwest deal was found by Cheapflights users on 6/14. 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 8/65:00 am
BOS
- STL
Nonstop2h 50m
Southwest
Mon 8/106:55 pm
STL
- BOS
Nonstop2h 35m
Southwest
Deal found 6/14![Southwest logo]()
$359
This United Airlines deal was found by Cheapflights users on 6/13. 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.
Sat 8/156:53 pm
PWM
- STL
1 stop5h 45m
United Airlines
Sun 8/1612:59 pm
STL
- PWM
1 stop7h 24m
United Airlines
Deal found 6/13![United Airlines logo]()
$401
This Delta deal was found by Cheapflights users on 6/16. 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.
Thu 7/99:00 am
BOS
- STL
1 stop7h 43m
Delta
Sat 7/116:09 pm
STL
- BOS
1 stop4h 50m
Delta
Deal found 6/16![Delta logo]()
$447
This United Airlines deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/258:05 am
BOS
- STL
1 stop8h 33m
United Airlines
Wed 8/268:00 am
STL
- BOS
2 stops7h 42m
United Airlines
Deal found 6/14![United Airlines logo]()
$417
This Southwest deal was found by Cheapflights users on 6/15. 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.
Sun 8/25:45 am
MHT
- STL
1 stop6h 20m
Southwest
Wed 8/53:45 pm
STL
- MHT
1 stop4h 25m
Southwest
Deal found 6/15![Southwest logo]()
$380
This United Airlines deal was found by Cheapflights users on 6/16. 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 11/175:06 pm
PWM
- STL
1 stop7h 19m
United Airlines
Wed 11/186:30 am
STL
- PWM
1 stop6h 08m
United Airlines
Deal found 6/16![United Airlines logo]()
$423
This Southwest deal was found by Cheapflights users on 6/17. 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 9/105:40 am
MHT
- STL
1 stop6h 55m
Southwest
Sun 9/133:15 pm
STL
- MHT
2 stops7h 10m
Southwest
Deal found 6/17![Southwest logo]()
$406
This United Airlines deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/146:53 pm
PWM
- STL
1 stop5h 45m
United Airlines
Sun 8/1612:59 pm
STL
- PWM
1 stop7h 24m
United Airlines
Deal found 6/13![United Airlines logo]()
$427
This Southwest deal was found by Cheapflights users on 6/16. 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 7/159:10 am
MHT
- STL
2 stops9h 15m
Southwest
Sat 7/185:40 am
STL
- MHT
1 stop4h 10m
Southwest
Deal found 6/16![Southwest logo]()
$414
This United Airlines deal was found by Cheapflights users on 6/17. 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 9/222:46 pm
MHT
- STL
2 stops8h 14m
United Airlines
Wed 9/238:50 am
STL
- MHT
2 stops9h 10m
United Airlines
Deal found 6/17![United Airlines logo]()
$433
This Southwest deal was found by Cheapflights users on 6/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/131:25 pm
BOS
- STL
2 stops8h 25m
Southwest
Tue 7/143:15 pm
STL
- BOS
2 stops7h 10m
Southwest
Deal found 6/13![Southwest logo]()
$419
This United Airlines deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/77:38 am
BOS
- STL
2 stops7h 39m
United Airlines
Wed 10/148:00 am
STL
- BOS
2 stops7h 46m
United Airlines
Deal found 6/17![United Airlines logo]()
$437
This Southwest deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/1511:35 am
BOS
- STL
2 stops7h 50m
Southwest
Fri 7/179:55 am
STL
- BOS
2 stops6h 15m
Southwest
Deal found 6/17![Southwest logo]()
$419
This Southwest deal was found by Cheapflights users on 6/15. 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.
Thu 9/245:00 am
BOS
- STL
Nonstop2h 50m
Southwest
Sun 9/274:25 pm
STL
- BOS
1 stop6h 00m
Southwest
Deal found 6/15![Southwest logo]()
$420
This United Airlines deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/16:00 am
BOS
- STL
1 stop5h 34m
United Airlines
Tue 7/215:59 pm
STL
- BOS
1 stop6h 15m
United Airlines
Deal found 6/14![United Airlines logo]()
$484
This Southwest deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/45:40 am
BOS
- STL
1 stop9h 25m
Southwest
Mon 9/76:55 pm
STL
- BOS
Nonstop2h 35m
Southwest
Deal found 6/17![Southwest logo]()
$420
This Southwest deal was found by Cheapflights users on 6/15. 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 7/315:35 am
PWM
- STL
2 stops13h 55m
Southwest
Mon 8/35:20 pm
STL
- PWM
1 stop5h 50m
Southwest
Deal found 6/15![Southwest logo]()
$438
This Southwest deal was found by Cheapflights users on 6/17. 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 7/165:35 am
PWM
- STL
1 stop6h 15m
Southwest
Wed 7/223:15 pm
STL
- PWM
2 stops6h 45m
Southwest
Deal found 6/17![Southwest logo]()
$442
This Southwest deal was found by Cheapflights users on 6/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/25:35 am
BOS
- STL
Nonstop2h 50m
Southwest
Sat 7/44:45 pm
STL
- BOS
Nonstop2h 35m
Southwest
Deal found 6/13![Southwest logo]()
$446
This Southwest deal was found by Cheapflights users on 6/16. 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 10/163:50 pm
BOS
- STL
2 stops7h 45m
Southwest
Sun 10/188:25 am
STL
- BOS
1 stop8h 25m
Southwest
Deal found 6/16![Southwest logo]()
$486
This Southwest deal was found by Cheapflights users on 6/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/16:25 pm
BOS
- STL
Nonstop3h 05m
Southwest
Mon 7/64:35 pm
STL
- BOS
2 stops6h 35m
Southwest
Deal found 6/13![Southwest logo]()
$489
Last-minute flights from New Hampshire to St. LouisDiscover last-minute flight deals from New Hampshire to St. Louis. Data last updated June 18, 2026 and is based on user searches.
Discover last-minute flight deals from New Hampshire to St. Louis. Data last updated June 18, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/186:00 am
BOS
- STL
1 stop12h 30m
Frontier
Sat 6/205:06 pm
STL
- BOS
1 stop7h 21m
Frontier
Deal found 6/17![Frontier logo]()
$354
This Kiwi.com deal was found by Cheapflights users on 6/18. 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.
Sun 6/216:00 am
BOS
- STL
1 stop12h 30m
Frontier
Sat 6/275:06 pm
STL
- BOS
1 stop7h 21m
Frontier
Deal found 6/18![Frontier logo]()
$361
This Frontier deal was found by Cheapflights users on 6/18. 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.
Tue 6/236:00 am
BOS
- STL
1 stop12h 30m
Frontier
Fri 6/265:06 pm
STL
- BOS
1 stop7h 21m
Frontier
Deal found 6/18![Frontier logo]()
$356
This Frontier deal was found by Cheapflights users on 6/18. 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 6/256:00 am
BOS
- STL
1 stop12h 30m
Frontier
Sat 6/275:06 pm
STL
- BOS
1 stop7h 21m
Frontier
Deal found 6/18![Frontier logo]()
$351
This United Airlines deal was found by Cheapflights users on 6/15. 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.
Tue 6/305:00 pm
PWM
- STL
1 stop5h 26m
United Airlines
Sat 7/43:22 pm
STL
- PWM
1 stop5h 19m
United Airlines
Deal found 6/15![United Airlines logo]()
$339
This Kiwi.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/306:00 am
BOS
- STL
1 stop12h 30m
Frontier
Wed 7/88:08 pm
STL
- BOS
2 stops13h 49m
Frontier
Deal found 6/16![Frontier logo]()
$357
This Kiwi.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/16:00 am
BOS
- STL
2 stops13h 51m
Frontier
Tue 7/76:34 pm
STL
- BOS
1 stop12h 12m
Frontier
Deal found 6/16![Frontier logo]()
$348
This Kiwi.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/710:04 am
BOS
- STL
2 stops23h 53m
Frontier
Thu 7/96:34 pm
STL
- BOS
1 stop12h 12m
Frontier
Deal found 6/16![Frontier logo]()
$350
This Southwest deal was found by Cheapflights users on 6/16. 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 7/86:15 pm
MHT
- STL
1 stop5h 15m
Southwest
Wed 7/155:40 am
STL
- MHT
1 stop4h 10m
Southwest
Deal found 6/16![Southwest logo]()
$333
This Southwest deal was found by Cheapflights users on 6/16. 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 7/1511:35 am
BOS
- STL
2 stops7h 50m
Southwest
Tue 7/213:15 pm
STL
- BOS
2 stops7h 10m
Southwest
Deal found 6/16![Southwest logo]()
$347
This Kiwi.com deal was found by Cheapflights users on 6/17. 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.
Thu 7/1611:52 am
BOS
- STL
1 stop6h 45m
Frontier
Fri 7/174:57 pm
STL
- BOS
2 stops18h 04m
Frontier
Deal found 6/17![Frontier logo]()
$359
This Kiwi.com deal was found by Cheapflights users on 6/17. 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.
Thu 7/1611:52 am
BOS
- STL
1 stop6h 45m
Frontier
Mon 7/208:08 pm
STL
- BOS
2 stops13h 49m
Frontier
Deal found 6/17![Frontier logo]()
$360
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 June 18, 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 June 18, 2026.
This Trip.com deal was found by Cheapflights users on 6/16. 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.
Tue 8/189:12 am
BOS
- STL
1 stop9h 18m
Frontier
Deal found 6/16![Frontier logo]()
$99
This Kiwi.com deal was found by Cheapflights users on 6/17. 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 8/1111:59 am
BOS
- STL
1 stop6h 38m
Frontier
Deal found 6/17![Frontier logo]()
$102
This Kiwi.com deal was found by Cheapflights users on 6/14. 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.
Wed 8/1912:01 pm
BOS
- STL
1 stop30h 29m
Frontier
Deal found 6/14![Frontier logo]()
$107
This Trip.com deal was found by Cheapflights users on 6/17. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/410:04 am
BOS
- STL
1 stop14h 55m
Frontier
Deal found 6/17![Frontier logo]()
$114
This Frontier deal was found by Cheapflights users on 6/18. 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.
Tue 7/1411:52 am
BOS
- STL
1 stop6h 45m
Frontier
Deal found 6/18![Frontier logo]()
$115
This Super.com deal was found by Cheapflights users on 6/17. 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.
Tue 7/2810:04 am
BOS
- STL
1 stop14h 55m
Frontier
Deal found 6/17![Frontier logo]()
$119
This Super.com deal was found by Cheapflights users on 6/15. 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 7/810:04 am
BOS
- STL
1 stop14h 55m
Frontier
Deal found 6/15![Frontier logo]()
$120
This Frontier deal was found by Cheapflights users on 6/18. 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 8/1311:59 am
BOS
- STL
1 stop6h 38m
Frontier
Deal found 6/18![Frontier logo]()
$121
This American Airlines deal was found by Cheapflights users on 6/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/227:39 pm
PWM
- STL
1 stop5h 37m
American Airlines
Deal found 6/17![American Airlines logo]()
$167
This American Airlines deal was found by Cheapflights users on 6/18. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/306:09 am
PWM
- STL
1 stop8h 03m
American Airlines
Deal found 6/18![American Airlines logo]()
$170
This Kiwi.com deal was found by Cheapflights users on 6/15. 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 7/238:22 pm
PWM
- STL
2 stops37h 35m
Multiple Airlines
Deal found 6/15![Multiple Airlines logo]()
$171
This United Airlines deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/217:57 am
PWM
- STL
2 stops7h 20m
United Airlines
Deal found 6/14![United Airlines logo]()
$172
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 June 18, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $333 (Delta) |
One-way from | $99 (Trip.com) |
Popular in | July |
Cheapest in | August |
Average price | $525 |
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 June 18, 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 7/8
6:15 pm-10:30 pm
1 stop5h 15m
Lambert-St Louis
Wed 7/15
5:40 am-10:50 am
1 stop4h 10m
$333
PortlandSt. Louis
PWM - STL
PWMSTL
Portland
Wed 9/9
5:45 am-1:55 pm
2 stops9h 10m
Lambert-St Louis
Thu 9/10
4:15 pm-10:25 pm
1 stop5h 10m
$359
Quickest round-trip
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Thu 8/6
5:00 am-6:50 am
Nonstop2h 50m
Lambert-St Louis
Mon 8/10
6:55 pm-10:30 pm
Nonstop2h 35m
$359
ManchesterSt. Louis
MHT - STL
MHTSTL
Manchester
Wed 11/18
5:20 pm-9:42 pm
1 stop5h 22m
Lambert-St Louis
Sun 11/22
6:17 pm-11:56 pm
1 stop4h 39m
$380
ManchesterSt. Louis
MHT - STL
MHTSTL
Manchester
Sun 8/2
5:45 am-11:05 am
1 stop6h 20m
Lambert-St Louis
Wed 8/5
3:45 pm-9:10 pm
1 stop4h 25m
$380
ManchesterSt. Louis
MHT - STL
MHTSTL
Manchester
Wed 11/18
1:30 pm-11:25 pm
2 stops10h 55m
Lambert-St Louis
Sun 11/22
1:27 pm-11:59 pm
2 stops9h 32m
$390
PortlandSt. Louis
PWM - STL
PWMSTL
Portland
Fri 10/23
6:00 am-10:48 am
1 stop5h 48m
Lambert-St Louis
Mon 10/26
6:00 am-12:18 pm
1 stop5h 18m
$401
PortlandSt. Louis
PWM - STL
PWMSTL
Portland
Sat 8/15
6:53 pm-11:38 pm
1 stop5h 45m
Lambert-St Louis
Sun 8/16
12:59 pm-9:23 pm
1 stop7h 24m
$401
ManchesterSt. Louis
MHT - STL
MHTSTL
Manchester
Thu 9/10
5:40 am-11:35 am
1 stop6h 55m
Lambert-St Louis
Sun 9/13
3:15 pm-11:25 pm
2 stops7h 10m
$406
ManchesterSt. Louis
MHT - STL
MHTSTL
Manchester
Wed 7/15
9:10 am-5:25 pm
2 stops9h 15m
Lambert-St Louis
Sat 7/18
5:40 am-10:50 am
1 stop4h 10m
$414
Showing 1-10 of 55 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.
BOS-STL
PWM-STL
MHT-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
BOS-STL
PWM-STL
MHT-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
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for New Hampshire to St. Louis
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Complete your trip
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New Hampshire and St. Louis flights
Browse other New Hampshire and St. Louis flight options. Last updated on June 18, 2026.
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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 June 18, 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 June 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$200 | Average$436 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$261 | Average$377 | FlexibilityNo cancel fee | On-time71% |