$79+ Cheap flights from St. Louis (STL) to New Hampshire
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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MHT
May 2 — May 91
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to New Hampshire 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
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Cheapest flights from St. Louis to New HampshireExplore the most affordable flight options available from St. Louis to New Hampshire. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 2, 2026.
Explore the most affordable flight options available from St. Louis to New Hampshire. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 2, 2026.
This Expedia deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/85:27 pm
STL
- BOS
1 stop6h 57m
Frontier
Sun 5/106:00 am
BOS
- STL
1 stop11h 54m
Frontier
Deal found 3/31![Frontier logo]()
$160
This Frontier deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/155:27 pm
STL
- BOS
1 stop6h 57m
Frontier
Sun 5/176:00 am
BOS
- STL
1 stop11h 54m
Frontier
Deal found 3/31![Frontier logo]()
$180
This Frontier deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/155:27 pm
STL
- BOS
1 stop6h 57m
Frontier
Sun 5/246:00 am
BOS
- STL
1 stop12h 33m
Frontier
Deal found 3/30![Frontier logo]()
$185
This Frontier deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 5/305:27 pm
STL
- BOS
1 stop6h 57m
Frontier
Tue 6/96:00 am
BOS
- STL
1 stop12h 30m
Frontier
Deal found 3/31![Frontier logo]()
$200
This Priceline deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/165:27 pm
STL
- BOS
1 stop6h 57m
Frontier
Tue 5/269:12 am
BOS
- STL
1 stop9h 21m
Frontier
Deal found 3/30![Frontier logo]()
$201
This Frontier deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 5/146:55 pm
STL
- BOS
1 stop11h 54m
Frontier
Sun 5/246:00 am
BOS
- STL
1 stop12h 33m
Frontier
Deal found 3/30![Frontier logo]()
$205
This Expedia deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/46:33 pm
STL
- BOS
1 stop5h 51m
Frontier
Sun 6/76:00 am
BOS
- STL
1 stop12h 33m
Frontier
Deal found 3/31![Frontier logo]()
$221
This Frontier deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 5/216:33 pm
STL
- BOS
1 stop12h 16m
Frontier
Tue 5/266:00 am
BOS
- STL
1 stop12h 33m
Frontier
Deal found 3/30![Frontier logo]()
$225
This Frontier deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 6/236:33 pm
STL
- BOS
1 stop12h 19m
Frontier
Sun 6/286:00 am
BOS
- STL
1 stop12h 30m
Frontier
Deal found 3/31![Frontier logo]()
$230
This Frontier deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/96:29 pm
STL
- BOS
1 stop5h 57m
Frontier
Sun 4/125:30 am
BOS
- STL
1 stop6h 08m
Frontier
Deal found 3/30![Frontier logo]()
$242
This Frontier deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/18:23 pm
STL
- BOS
1 stop11h 53m
Frontier
Mon 5/411:16 am
BOS
- STL
1 stop13h 03m
Frontier
Deal found 3/31![Frontier logo]()
$245
This Frontier deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 6/116:33 pm
STL
- BOS
1 stop5h 54m
Frontier
Tue 6/169:12 am
BOS
- STL
1 stop9h 18m
Frontier
Deal found 3/31![Frontier logo]()
$250
Best flights from St. Louis to New HampshireDiscover carefully curated flight deals from St. Louis to New Hampshire that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 2, 2026.
Discover carefully curated flight deals from St. Louis to New Hampshire that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 2, 2026.
This Delta deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/104:19 pm
STL
- PWM
1 stop5h 56m
Delta
Tue 6/236:57 pm
PWM
- STL
1 stop5h 59m
Delta
Deal found 3/31![Delta logo]()
$299
This Southwest deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/96:20 am
STL
- MHT
1 stop4h 30m
Southwest
Tue 5/123:45 pm
MHT
- STL
1 stop6h 20m
Southwest
Deal found 3/30![Southwest logo]()
$307
This United Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 8/256:00 am
STL
- PWM
2 stops7h 35m
United Airlines
Mon 8/315:05 pm
PWM
- STL
1 stop5h 17m
United Airlines
Deal found 3/30![United Airlines logo]()
$368
This Southwest deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/96:20 am
STL
- MHT
1 stop6h 50m
Southwest
Mon 5/117:10 pm
MHT
- STL
1 stop4h 35m
Southwest
Deal found 3/28![Southwest logo]()
$319
This Southwest deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 9/27:15 am
STL
- PWM
1 stop6h 00m
Southwest
Wed 9/96:15 pm
PWM
- STL
1 stop4h 55m
Southwest
Deal found 3/31![Southwest logo]()
$349
This United Airlines deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” 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 6/26:00 am
STL
- PWM
1 stop6h 25m
United Airlines
Wed 6/35:15 am
PWM
- STL
2 stops11h 31m
United Airlines
Deal found 4/1![United Airlines logo]()
$394
This Delta deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/194:13 pm
STL
- PWM
1 stop7h 39m
Delta
Mon 6/226:57 pm
PWM
- STL
1 stop5h 59m
Delta
Deal found 3/28![Delta logo]()
$427
This Southwest deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” 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 5/114:00 pm
STL
- BOS
1 stop4h 50m
Southwest
Thu 5/145:40 am
BOS
- STL
Nonstop3h 00m
Southwest
Deal found 4/1![Southwest logo]()
$363
This United Airlines deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 5/127:45 am
STL
- PWM
1 stop5h 29m
United Airlines
Wed 5/136:00 am
PWM
- STL
1 stop7h 47m
United Airlines
Deal found 3/31![United Airlines logo]()
$421
This Delta deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” 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 9/101:30 pm
STL
- PWM
1 stop8h 03m
Delta
Thu 9/176:00 am
PWM
- STL
1 stop5h 41m
Delta
Deal found 4/1![Delta logo]()
$427
This Southwest deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 6/103:15 pm
STL
- MHT
2 stops6h 30m
Southwest
Sat 6/135:35 am
MHT
- STL
1 stop6h 05m
Southwest
Deal found 3/31![Southwest logo]()
$372
This Delta deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” 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 9/176:00 am
STL
- PWM
1 stop6h 21m
Delta
Mon 9/216:00 am
PWM
- STL
1 stop7h 53m
Delta
Deal found 3/28![Delta logo]()
$427
This United Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 6/101:13 pm
STL
- PWM
2 stops9h 38m
United Airlines
Tue 6/234:51 pm
PWM
- STL
1 stop5h 25m
United Airlines
Deal found 3/30![United Airlines logo]()
$439
This Southwest deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 5/126:50 pm
STL
- BOS
Nonstop2h 30m
Southwest
Fri 5/156:45 pm
BOS
- STL
Nonstop3h 10m
Southwest
Deal found 3/31![Southwest logo]()
$389
This United Airlines deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” 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 5/57:45 am
STL
- BOS
1 stop8h 37m
United Airlines
Sat 5/97:10 pm
BOS
- STL
1 stop5h 47m
United Airlines
Deal found 4/1![United Airlines logo]()
$443
This Delta deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” 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 9/191:30 pm
STL
- BOS
1 stop6h 04m
Delta
Sun 9/278:00 am
BOS
- STL
1 stop5h 53m
Delta
Deal found 3/28![Delta logo]()
$481
This Southwest deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/73:45 pm
STL
- PWM
1 stop6h 10m
Southwest
Tue 7/147:10 pm
PWM
- STL
1 stop4h 50m
Southwest
Deal found 3/29![Southwest logo]()
$399
This United Airlines deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/287:45 am
STL
- BOS
1 stop6h 03m
United Airlines
Sat 5/212:30 pm
BOS
- STL
1 stop6h 46m
United Airlines
Deal found 3/29![United Airlines logo]()
$463
This Delta deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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.
Sun 6/76:05 am
STL
- BOS
1 stop7h 19m
Delta
Sat 6/135:30 am
BOS
- STL
1 stop5h 02m
Delta
Deal found 3/31![Delta logo]()
$481
This Southwest deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/143:15 pm
STL
- MHT
2 stops6h 30m
Southwest
Sat 7/185:35 am
MHT
- STL
1 stop6h 05m
Southwest
Deal found 3/31![Southwest logo]()
$402
This Southwest deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 6/47:55 pm
STL
- BOS
Nonstop2h 30m
Southwest
Sun 6/75:50 am
BOS
- STL
Nonstop2h 55m
Southwest
Deal found 3/31![Southwest logo]()
$407
This Southwest deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/202:30 pm
STL
- PWM
1 stop5h 30m
Southwest
Fri 6/265:35 am
PWM
- STL
1 stop6h 15m
Southwest
Deal found 3/28![Southwest logo]()
$427
This Southwest deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 9/510:15 am
STL
- MHT
1 stop8h 25m
Southwest
Sun 9/138:00 am
MHT
- STL
1 stop4h 50m
Southwest
Deal found 3/30![Southwest logo]()
$427
This Southwest deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” 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 5/175:25 am
STL
- MHT
1 stop4h 15m
Southwest
Sun 5/243:55 pm
MHT
- STL
1 stop5h 30m
Southwest
Deal found 4/1![Southwest logo]()
$427
This Southwest deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” 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 5/12:30 pm
STL
- BOS
Nonstop2h 35m
Southwest
Sun 5/35:40 am
BOS
- STL
Nonstop3h 00m
Southwest
Deal found 4/1![Southwest logo]()
$461
This Southwest deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” 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 9/264:15 pm
STL
- BOS
Nonstop2h 35m
Southwest
Wed 10/75:10 pm
BOS
- STL
1 stop6h 20m
Southwest
Deal found 3/28![Southwest logo]()
$471
This Southwest deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” 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 7/247:55 pm
STL
- BOS
Nonstop2h 30m
Southwest
Sun 8/28:00 am
BOS
- STL
1 stop8h 00m
Southwest
Deal found 4/1![Southwest logo]()
$471
This Southwest deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” 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 8/168:20 am
STL
- BOS
Nonstop2h 35m
Southwest
Wed 8/265:50 pm
BOS
- STL
1 stop5h 20m
Southwest
Deal found 3/28![Southwest logo]()
$471
This Southwest deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/304:00 pm
STL
- MHT
1 stop6h 30m
Southwest
Tue 5/512:45 pm
MHT
- STL
2 stops8h 15m
Southwest
Deal found 3/28![Southwest logo]()
$512
Last-minute flights from St. Louis to New HampshireDiscover last-minute flight deals from St. Louis to New Hampshire. Data last updated April 2, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to New Hampshire. Data last updated April 2, 2026 and is based on user searches.
This Expedia deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/26:29 pm
STL
- BOS
1 stop6h 00m
Frontier
Sun 4/125:30 am
BOS
- STL
1 stop6h 08m
Frontier
Deal found 3/30![Frontier logo]()
$256
This Frontier deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/96:29 pm
STL
- BOS
1 stop5h 57m
Frontier
Sun 4/125:30 am
BOS
- STL
1 stop6h 08m
Frontier
Deal found 3/30![Frontier logo]()
$242
This Frontier deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/18:23 pm
STL
- BOS
1 stop11h 53m
Frontier
Mon 5/411:16 am
BOS
- STL
1 stop13h 03m
Frontier
Deal found 3/31![Frontier logo]()
$245
This Expedia deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/18:23 pm
STL
- BOS
1 stop11h 53m
Frontier
Sun 5/310:53 am
BOS
- STL
1 stop13h 26m
Frontier
Deal found 3/30![Frontier logo]()
$267
This Expedia deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/85:27 pm
STL
- BOS
1 stop6h 57m
Frontier
Sun 5/106:00 am
BOS
- STL
1 stop11h 54m
Frontier
Deal found 3/31![Frontier logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/126:33 pm
STL
- BOS
1 stop5h 51m
Frontier
Fri 5/156:00 am
BOS
- STL
1 stop27h 55m
Frontier
Deal found 3/31![Frontier logo]()
$255
This Frontier deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 5/146:55 pm
STL
- BOS
1 stop11h 54m
Frontier
Sun 5/246:00 am
BOS
- STL
1 stop12h 33m
Frontier
Deal found 3/30![Frontier logo]()
$205
This Frontier deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/155:27 pm
STL
- BOS
1 stop6h 57m
Frontier
Sun 5/176:00 am
BOS
- STL
1 stop11h 54m
Frontier
Deal found 3/30![Frontier logo]()
$180
This Frontier deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/155:27 pm
STL
- BOS
1 stop6h 57m
Frontier
Sun 5/246:00 am
BOS
- STL
1 stop12h 33m
Frontier
Deal found 3/30![Frontier logo]()
$185
This Priceline deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/165:27 pm
STL
- BOS
1 stop6h 57m
Frontier
Tue 5/269:12 am
BOS
- STL
1 stop9h 21m
Frontier
Deal found 3/30![Frontier logo]()
$201
This Frontier deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 5/216:33 pm
STL
- BOS
1 stop12h 16m
Frontier
Tue 5/266:00 am
BOS
- STL
1 stop12h 33m
Frontier
Deal found 3/30![Frontier logo]()
$225
This Frontier deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 5/305:27 pm
STL
- BOS
1 stop6h 57m
Frontier
Tue 6/96:00 am
BOS
- STL
1 stop12h 30m
Frontier
Deal found 3/31![Frontier logo]()
$200
One-way flights from St. Louis to New HampshireSearch for one-way flight options from St. Louis to New Hampshire. Find affordable one-way fares based on user searches. Data last updated April 2, 2026.
Search for one-way flight options from St. Louis to New Hampshire. Find affordable one-way fares based on user searches. Data last updated April 2, 2026.
This Super.com deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” 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.
Fri 5/85:27 pm
STL
- BOS
1 stop6h 57m
Frontier
Deal found 3/29![Frontier logo]()
$79
This Frontier deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/205:27 pm
STL
- BOS
1 stop6h 57m
Frontier
Deal found 3/30![Frontier logo]()
$80
This Trip.com deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” 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 6/105:33 pm
STL
- BOS
1 stop6h 54m
Frontier
Deal found 4/1![Frontier logo]()
$81
This Expedia deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/76:55 pm
STL
- BOS
1 stop11h 54m
Frontier
Deal found 3/31![Frontier logo]()
$86
This Frontier deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/106:55 pm
STL
- BOS
1 stop11h 54m
Frontier
Deal found 4/1![Frontier logo]()
$87
This Priceline deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/286:33 pm
STL
- BOS
1 stop5h 51m
Frontier
Deal found 3/31![Frontier logo]()
$100
This Kiwi.com deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” 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 4/278:23 pm
STL
- BOS
1 stop28h 08m
Frontier
Deal found 4/1![Frontier logo]()
$101
This Expedia deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/295:27 pm
STL
- BOS
1 stop6h 57m
Frontier
Deal found 3/30![Frontier logo]()
$102
This Super.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 4/144:59 pm
STL
- BOS
1 stop16h 22m
Frontier
Deal found 3/31![Frontier logo]()
$104
This Priceline deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/306:33 pm
STL
- BOS
1 stop5h 54m
Frontier
Deal found 3/31![Frontier logo]()
$105
This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 6/15:27 pm
STL
- BOS
2 stops40h 39m
Frontier
Deal found 3/31![Frontier logo]()
$108
This Delta deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” 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 5/196:45 am
STL
- PWM
1 stop4h 15m
Delta
Deal found 4/1![Delta logo]()
$150
Find flight deals from St. Louis to New Hampshire
Keep the following information in mind while searching for St. Louis to New Hampshire flight deals. Data was last updated April 2, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $160 (Expedia) |
One-way from | $79 (Super.com) |
Popular in | February |
Cheapest in | September |
Average price | $451 |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to New Hampshire 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 April 2, 2026.
Use the filters below to find and compare flights from St. Louis to New Hampshire that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisPortland
STL - PWM
STLPWM
Lambert-St Louis
Wed 6/10
4:19 pm-11:15 pm
1 stop5h 56m
Portland
Tue 6/23
6:57 pm-11:56 pm
1 stop5h 59m
$299
St. LouisManchester
STL - MHT
STLMHT
Lambert-St Louis
Sat 5/9
6:20 am-11:50 am
1 stop4h 30m
Manchester
Tue 5/12
3:45 pm-9:05 pm
1 stop6h 20m
$307
St. LouisManchester
STL - MHT
STLMHT
Lambert-St Louis
Sat 5/9
6:20 am-2:10 pm
1 stop6h 50m
Manchester
Mon 5/11
7:10 pm-10:45 pm
1 stop4h 35m
$319
St. LouisPortland
STL - PWM
STLPWM
Lambert-St Louis
Wed 9/2
7:15 am-2:15 pm
1 stop6h 00m
Portland
Wed 9/9
6:15 pm-10:10 pm
1 stop4h 55m
$349
St. LouisBoston
STL - BOS
STLBOS
Lambert-St Louis
Mon 5/11
4:00 pm-9:50 pm
1 stop4h 50m
Boston Logan Intl
Thu 5/14
5:40 am-7:40 am
Nonstop3h 00m
$363
St. LouisPortland
STL - PWM
STLPWM
Lambert-St Louis
Tue 8/25
6:00 am-2:35 pm
2 stops7h 35m
Portland
Mon 8/31
5:05 pm-9:22 pm
1 stop5h 17m
$368
St. LouisManchester
STL - MHT
STLMHT
Lambert-St Louis
Wed 6/10
3:15 pm-10:45 pm
2 stops6h 30m
Manchester
Sat 6/13
5:35 am-10:40 am
1 stop6h 05m
$372
St. LouisBoston
STL - BOS
STLBOS
Lambert-St Louis
Tue 5/12
6:50 pm-10:20 pm
Nonstop2h 30m
Boston Logan Intl
Fri 5/15
6:45 pm-8:55 pm
Nonstop3h 10m
$389
St. LouisPortland
STL - PWM
STLPWM
Lambert-St Louis
Tue 6/2
6:00 am-1:25 pm
1 stop6h 25m
Portland
Wed 6/3
5:15 am-3:46 pm
2 stops11h 31m
$394
St. LouisPortland
STL - PWM
STLPWM
Lambert-St Louis
Tue 7/7
3:45 pm-10:55 pm
1 stop6h 10m
Portland
Tue 7/14
7:10 pm-11:00 pm
1 stop4h 50m
$399
Showing 1-10 of 55 resultsSorted by cheapest first
Best time to book a flight from St. Louis to New Hampshire
Have a flexible travel schedule? Discover the best time to fly to New Hampshire from St. Louis with our price prediction graph.
STL-PWM
STL-MHT
STL-BOS
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 St. Louis to New Hampshire
STL-USNH
STL-PWM
STL-MHT
STL-BOS
What is the cheapest month to book a flight from St. Louis to New Hampshire?
Currently, September is the cheapest month in which you can book a flight from St. Louis to New Hampshire (average of $185). Flying from St. Louis to New Hampshire in December is currently the most expensive (average of $495). 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 St. Louis to New Hampshire?
Reviews of airlines servicing New Hampshire
Get insights into the airlines that provide service to New Hampshire. 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 New Hampshire. Reviews last updated April 2, 2026.
Get a feel of what it's like to fly with Southwest and American Airlines from St. Louis to New Hampshire by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Related info for your journey
Find useful and relevant information for your journey from St. Louis to New Hampshire. 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 St. Louis to New Hampshire
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Complete your trip
Complete your trip to New Hampshire by adding a car rental and/or hotel reservation to your travel itinerary.
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Find flights from St. Louis to New Hampshire, based on your preferred cabin class, be it economy, premium economy, business, or first class.
St. Louis and New Hampshire flights
Browse other St. Louis and New Hampshire flight options. Last updated on April 2, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
St. Louis to New Hampshire flights
Consider these flights traveling from St. Louis to New Hampshire.
Top 2 airlines flying from St. Louis to New Hampshire
Discover the top 2 airlines that operate flights from St. Louis to New Hampshire. 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 April 2, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$200 | Average$365 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$256 | Average$383 | FlexibilityNo cancel fee | On-time71% |