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St. Louis

$91+ 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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
MHT — STL
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap 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 September 11, 2025.

Round-trip from

$229
(United Airlines)

One-way from

$91
(Kiwi.com)

Popular in

April

Cheapest in

August

Average price

$385
From New Hampshire to Lambert-St Louis
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One-way flight from New Hampshire to Lambert-St Louis
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Highest demand for flights based on searches. 8% potential increase in price ($41 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 11, 2025.

This United Airlines deal was found by Cheapflights users on 9/11. 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 9/306:00 amPWM - STL
1 stop5h 48mUnited Airlines
Tue 9/303:23 pmSTL - PWM
1 stop5h 21mUnited Airlines
Deal found 9/11$229
This Southwest deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” 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 10/215:45 pmMHT - STL
1 stop5h 05mSouthwest
Mon 10/274:55 pmSTL - MHT
1 stop6h 25mSouthwest
Deal found 9/10$234
This Southwest deal was found by Cheapflights users on 9/11. 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.
Thu 11/132:05 pmMHT - STL
2 stops8h 25mSouthwest
Wed 11/196:05 amSTL - MHT
1 stop5h 15mSouthwest
Deal found 9/11$239
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” 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 10/85:42 amPWM - STL
2 stops11h 13mDelta
Wed 10/156:40 amSTL - PWM
1 stop4h 20mDelta
Deal found 9/10$242
This American Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” 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 10/165:59 pmPWM - STL
1 stop6h 59mAmerican Airlines
Sat 10/186:00 amSTL - PWM
1 stop5h 42mAmerican Airlines
Deal found 9/10$243
This Southwest deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” 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 10/275:05 pmMHT - STL
1 stop4h 40mSouthwest
Wed 10/298:45 amSTL - MHT
1 stop5h 20mSouthwest
Deal found 9/10$254
This Southwest deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” 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 11/157:25 amBOS - STL
Nonstop3h 15mSouthwest
Mon 11/176:10 pmSTL - BOS
Nonstop2h 30mSouthwest
Deal found 9/8$271
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” 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 10/31:35 pmPWM - STL
1 stop5h 12mDelta
Mon 10/61:30 pmSTL - PWM
1 stop7h 49mDelta
Deal found 9/10$272
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” 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 10/142:15 pmBOS - STL
2 stops19h 52mMultiple Airlines
Sat 10/187:15 pmSTL - BOS
1 stop15h 11mMultiple Airlines
Deal found 9/9$273
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” 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 9/273:00 pmBOS - STL
1 stop19h 40mMultiple Airlines
Tue 9/307:55 pmSTL - BOS
2 stops35h 48mMultiple Airlines
Deal found 9/9$274
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” 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 10/83:00 pmBOS - STL
2 stops19h 22mMultiple Airlines
Sun 10/1210:57 amSTL - BOS
1 stop12h 02mMultiple Airlines
Deal found 9/9$275
This Delta deal was found by Cheapflights users on 9/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/291:27 pmPWM - STL
1 stop5h 35mDelta
Sun 11/25:00 amSTL - PWM
1 stop5h 32mDelta
Deal found 9/11$277

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 September 11, 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 9/30

6:00 am-12:51 pm

1 stop7h 51m

Lambert-St Louis

Tue 9/30

6:00 pm-11:45 pm

1 stop4h 45m

$229

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Tue 9/30

6:14 am-10:49 am

1 stop5h 35m

Lambert-St Louis

Tue 9/30

3:23 pm-11:59 pm

2 stops7h 36m

$234

ManchesterSt. Louis

MHT - STL

MHTSTL

Manchester

Tue 10/21

5:45 pm-9:50 pm

1 stop5h 05m

Lambert-St Louis

Mon 10/27

4:55 pm-12:20 am

1 stop6h 25m

$234

ManchesterSt. Louis

MHT - STL

MHTSTL

Manchester

Thu 11/13

2:05 pm-9:30 pm

2 stops8h 25m

Lambert-St Louis

Wed 11/19

6:05 am-12:20 pm

1 stop5h 15m

$239

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Wed 10/8

5:42 am-3:55 pm

2 stops11h 13m

Lambert-St Louis

Wed 10/15

6:40 am-12:00 pm

1 stop4h 20m

$242

ManchesterSt. Louis

MHT - STL

MHTSTL

Manchester

Mon 10/27

5:05 pm-8:45 pm

1 stop4h 40m

Lambert-St Louis

Wed 10/29

8:45 am-3:05 pm

1 stop5h 20m

$254

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Tue 9/30

7:35 am-9:30 am

Nonstop2h 55m

Lambert-St Louis

Tue 9/30

6:40 pm-10:15 pm

Nonstop2h 35m

$271

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Sat 10/25

5:35 am-7:35 am

Nonstop3h 00m

Lambert-St Louis

Mon 10/27

3:00 pm-6:35 pm

Nonstop2h 35m

$271

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Fri 10/3

1:35 pm-5:47 pm

1 stop5h 12m

Lambert-St Louis

Mon 10/6

1:30 pm-10:19 pm

1 stop7h 49m

$272

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Fri 10/3

5:10 pm-11:07 pm

1 stop6h 57m

Lambert-St Louis

Mon 10/6

4:34 pm-10:45 pm

1 stop5h 11m

$272

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 48 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 $311). Flying from New Hampshire to St. Louis in March is currently the most expensive (average of $356). 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 September 11, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from New Hampshire to St. Louis as you normally would.

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?

    American Airlines, United Airlines, and Southwest can get you from New Hampshire to St. Louis in just under 5h 05m. Your travel time can differ by up to 2h 46m. New Hampshire and St. Louis are separated by a distance of 1028 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from New Hampshire to St. Louis one-way?

    The cheapest airlines for a one-way flight from New Hampshire to St. Louis are Southwest ($96), American Airlines ($129), and United Airlines ($149).

  • 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, Portland - Lambert-St Louis or Manchester - 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 $311). Flying from New Hampshire to St. Louis in March is currently the most expensive (average of $356). 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
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

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Alternative routes for New Hampshire to St. Louis

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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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$264Average$426FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$278Average$408FlexibilityNo cancel feeOn-time71%

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