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St. Louis

$63+ 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 2/17. Fares are subject to change and may not be available on all flights or dates of travel.
MHT — STL
Jan 15 — Jan 221
Thu 1/15
Thu 1/22
1 adult, Economy
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Cheap flight deals from New Hampshire to St. Louis

Cheapest flights from New Hampshire to St. Louis
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 December 16, 2025.

This Super.com deal was found by Cheapflights users on 12/16. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1812:22 pmBOS - STL
1 stop11h 11mFrontier
Wed 12/314:27 pmSTL - BOS
1 stop16h 25mFrontier
Deal found 12/16$329
This American Airlines deal was found by Cheapflights users on 12/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/251:48 pmBOS - STL
1 stop19h 47mAmerican Airlines
Fri 12/2610:01 amSTL - BOS
Nonstop2h 42mAmerican Airlines
Deal found 12/15$345
This Kiwi.com deal was found by Cheapflights users on 12/16. 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 12/2411:09 amBOS - STL
1 stop23h 31mMultiple Airlines
Sun 1/115:11 pmSTL - BOS
2 stops22h 17mMultiple Airlines
Deal found 12/16$357
This Kiwi.com deal was found by Cheapflights users on 12/16. 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 12/2411:09 amBOS - STL
1 stop23h 31mFrontier
Sun 1/115:11 pmSTL - BOS
1 stop16h 35mFrontier
Deal found 12/16$359
This Kiwi.com deal was found by Cheapflights users on 12/16. 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 12/236:00 amBOS - STL
2 stops41h 33mMultiple Airlines
Tue 1/135:11 pmSTL - BOS
1 stop20h 27mMultiple Airlines
Deal found 12/16$364
This American Airlines deal was found by Cheapflights users on 12/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/258:45 amBOS - STL
Nonstop3h 25mAmerican Airlines
Thu 1/15:00 amSTL - BOS
1 stop5h 06mAmerican Airlines
Deal found 12/15$366
This American Airlines deal was found by Cheapflights users on 12/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/226:36 amBOS - STL
1 stop7h 47mAmerican Airlines
Mon 12/222:50 pmSTL - BOS
Nonstop2h 39mAmerican Airlines
Deal found 12/15$370
This Super.com deal was found by Cheapflights users on 12/16. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2312:08 pmBOS - STL
1 stop11h 25mFrontier
Wed 12/314:27 pmSTL - BOS
1 stop16h 25mFrontier
Deal found 12/16$375
This Kiwi.com deal was found by Cheapflights users on 12/16. 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 12/2411:55 amBOS - STL
2 stops22h 45mMultiple Airlines
Tue 1/135:11 pmSTL - BOS
1 stop20h 27mMultiple Airlines
Deal found 12/16$380
This American Airlines deal was found by Cheapflights users on 12/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/314:10 pmMHT - STL
1 stop5h 56mAmerican Airlines
Sun 1/46:35 pmSTL - MHT
1 stop5h 10mAmerican Airlines
Deal found 12/16$382
This Kiwi.com deal was found by Cheapflights users on 12/16. 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.
Mon 12/2210:43 amBOS - STL
2 stops36h 50mMultiple Airlines
Tue 1/135:11 pmSTL - BOS
1 stop20h 27mMultiple Airlines
Deal found 12/16$386
This American Airlines deal was found by Cheapflights users on 12/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/245:10 amBOS - STL
1 stop5h 49mAmerican Airlines
Wed 12/312:50 pmSTL - BOS
Nonstop2h 39mAmerican Airlines
Deal found 12/16$387

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 December 16, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$287
(Kiwi.com)

One-way from

$63
(Trip.com)

Popular in

April

Cheapest in

August

Average price

$461
Provider with most accurate pricing for Boston Logan Intl-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-Lambert-St Louis flights.
Search Deals
From New Hampshire to Lambert-St Louis
Search Deals
One-way flight from New Hampshire to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($38 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 16, 2025.
Use the filters below to find and compare flights from New Hampshire to St. Louis that are best for you.

Fly from

New Hampshire

Fly to

St. Louis

Route

Depart

Return

Price

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Tue 1/6

7:27 pm-11:59 pm

1 stop5h 32m

Lambert-St Louis

Thu 1/8

8:30 am-2:31 pm

1 stop5h 01m

$313

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Mon 1/26

7:27 pm-11:59 pm

1 stop5h 32m

Lambert-St Louis

Wed 1/28

8:30 am-2:31 pm

1 stop5h 01m

$313

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Tue 1/6

5:45 am-12:45 pm

2 stops8h 00m

Lambert-St Louis

Thu 1/8

6:50 am-12:10 pm

1 stop4h 20m

$318

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Thu 1/22

5:30 am-4:37 pm

2 stops12h 07m

Lambert-St Louis

Mon 1/26

6:35 am-12:03 pm

1 stop4h 28m

$338

ManchesterSt. Louis

MHT - STL

MHTSTL

Manchester

Tue 1/6

3:25 pm-9:55 pm

2 stops7h 30m

Lambert-St Louis

Wed 1/14

6:50 am-2:50 pm

1 stop7h 00m

$338

ManchesterSt. Louis

MHT - STL

MHTSTL

Manchester

Fri 2/6

2:17 pm-10:58 pm

2 stops9h 41m

Lambert-St Louis

Tue 2/10

9:57 am-6:51 pm

2 stops7h 54m

$357

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Sat 1/17

6:00 am-10:41 am

1 stop5h 41m

Lambert-St Louis

Tue 1/20

7:00 am-1:56 pm

1 stop5h 56m

$361

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Tue 1/13

8:00 am-12:33 pm

1 stop5h 33m

Lambert-St Louis

Tue 1/13

5:00 pm-1:04 am

1 stop7h 04m

$371

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Sat 1/31

7:10 am-9:30 am

Nonstop3h 20m

Lambert-St Louis

Mon 2/2

5:55 pm-9:25 pm

Nonstop2h 30m

$372

ManchesterSt. Louis

MHT - STL

MHTSTL

Manchester

Mon 4/27

5:47 am-9:40 am

1 stop4h 53m

Lambert-St Louis

Wed 4/29

10:48 am-4:35 pm

1 stop4h 47m

$377

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

Showing 1-10 of 43 results
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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.
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

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 May is currently the most expensive (average of $358). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from NH to STL?

Find hourly flight availability from New Hampshire to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 16, 2025.

One of the essential ways to save on airfare from New Hampshire to St. Louis is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 16% on airfare.

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.

  • What airport do you fly into for flights to St. Louis from New Hampshire?

    Lambert-St Louis (STL), located 12.7 mi from the city center, is the airport you fly into when you book flights from New Hampshire to St. Louis.

  • How long is the flight from New Hampshire to St. Louis?

    United Airlines, Southwest, and Delta can get you from New Hampshire to St. Louis in just under 5h 32m. Your travel time can differ by up to 6h 35m. New Hampshire and St. Louis are separated by a distance of 1092 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the most popular routes from New Hampshire to St. Louis?

    When deciding which route to take from New Hampshire to St. Louis consider Boston Logan Intl - Lambert-St Louis, Manchester - Lambert-St Louis or Portland - Lambert-St Louis as they are the most popular.

  • Can I find deals for flights from New Hampshire to St. Louis that include hotel bookings?

    Yes. In addition to deals on New Hampshire to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from New Hampshire to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from New Hampshire to St. Louis.

  • Can I find deals for business class flights from New Hampshire to St. Louis?

    Yes. Cheapflights offers flight deals from New Hampshire to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • 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 May is currently the most expensive (average of $358). 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.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Swansea
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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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.
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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 December 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$264Average$445FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$274Average$395FlexibilityNo cancel feeOn-time71%

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