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St. Louis

$65+ 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 9/18. Fares are subject to change and may not be available on all flights or dates of travel.
MHT — STL
Jul 7 — Jul 141
Mon 7/7
Mon 7/14
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 July 2, 2025.

Round-trip from

$201
(Southwest)

One-way from

$69
(FlightHub)

Popular in

April

Cheapest in

September

Average price

$438
From New Hampshire to Lambert-St Louis
Search Deals
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 ($42 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 July 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 July 2, 2025.

This Southwest deal was found by Cheapflights users on 6/30. 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.
Thu 8/75:50 amMHT - STL
1 stop6h 40mSouthwest
Tue 8/122:15 pmSTL - MHT
1 stop7h 00mSouthwest
Deal found 6/30$201
This American Airlines deal was found by Cheapflights users on 6/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2012:28 pmMHT - STL
1 stop6h 55mAmerican Airlines
Sat 8/236:00 amSTL - MHT
1 stop13h 35mAmerican Airlines
Deal found 6/30$231
This American Airlines deal was found by Cheapflights users on 6/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/76:00 amPWM - STL
1 stop11h 04mAmerican Airlines
Wed 10/88:42 amSTL - PWM
1 stop13h 03mAmerican Airlines
Deal found 6/30$311
This American Airlines deal was found by Cheapflights users on 7/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/297:00 amBOS - STL
Nonstop3h 15mAmerican Airlines
Tue 9/29:45 amSTL - BOS
Nonstop2h 41mAmerican Airlines
Deal found 7/1$312
This FlightHub deal was found by Cheapflights users on 6/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/168:39 pmBOS - STL
1 stop20h 52mSpirit Airlines
Sat 7/1910:45 amSTL - BOS
1 stop6h 36mSpirit Airlines
Deal found 6/30$320
This Delta deal was found by Cheapflights users on 7/1. 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.
Sat 8/167:00 amPWM - STL
2 stops8h 28mDelta
Sat 8/231:05 pmSTL - PWM
1 stop5h 36mDelta
Deal found 7/1$322
This Southwest deal was found by Cheapflights users on 7/1. 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 8/294:05 pmBOS - STL
1 stop7h 30mSouthwest
Mon 9/17:50 amSTL - BOS
Nonstop2h 40mSouthwest
Deal found 7/1$322
This FlightHub deal was found by Cheapflights users on 7/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/119:40 amBOS - STL
1 stop15h 07mMultiple Airlines
Tue 7/155:26 pmSTL - BOS
1 stop25h 08mMultiple Airlines
Deal found 7/2$324
This Delta deal was found by Cheapflights users on 6/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/145:15 amBOS - STL
1 stop9h 05mDelta
Sat 8/161:26 pmSTL - BOS
1 stop6h 15mDelta
Deal found 6/30$326
This Justfly.com deal was found by Cheapflights users on 7/2. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/79:40 amBOS - STL
1 stop15h 07mFrontier
Fri 7/115:40 pmSTL - BOS
1 stop13h 55mFrontier
Deal found 7/2$328
This Southwest deal was found by Cheapflights users on 7/1. 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 10/242:40 pmPWM - STL
2 stops9h 15mSouthwest
Mon 10/279:50 amSTL - PWM
1 stop5h 40mSouthwest
Deal found 7/1$352
This United Airlines deal was found by Cheapflights users on 7/1. 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.
Mon 11/246:00 amBOS - STL
1 stop17h 47mUnited Airlines
Thu 11/276:45 amSTL - BOS
1 stop11h 35mUnited Airlines
Deal found 7/1$353

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 July 2, 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

ManchesterSt. Louis

MHT - STL

MHTSTL

Manchester

Thu 8/7

5:50 am-11:30 am

1 stop6h 40m

Lambert-St Louis

Tue 8/12

2:15 pm-10:15 pm

1 stop7h 00m

$201

ManchesterSt. Louis

MHT - STL

MHTSTL

Manchester

Wed 8/20

12:28 pm-6:23 pm

1 stop6h 55m

Lambert-St Louis

Sat 8/23

6:00 am-8:35 pm

1 stop13h 35m

$231

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Tue 10/7

6:00 am-4:04 pm

1 stop11h 04m

Lambert-St Louis

Wed 10/8

8:42 am-10:45 pm

1 stop13h 03m

$311

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Fri 8/29

7:00 am-9:15 am

Nonstop3h 15m

Lambert-St Louis

Tue 9/2

9:45 am-1:26 pm

Nonstop2h 41m

$312

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Wed 7/16

8:39 pm-4:31 pm

1 stop20h 52m

Lambert-St Louis

Sat 7/19

10:45 am-6:21 pm

1 stop6h 36m

$320

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Sat 8/16

7:00 am-2:28 pm

2 stops8h 28m

Lambert-St Louis

Sat 8/23

1:05 pm-7:41 pm

1 stop5h 36m

$322

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Fri 8/29

4:05 pm-10:35 pm

1 stop7h 30m

Lambert-St Louis

Mon 9/1

7:25 pm-11:00 pm

Nonstop2h 35m

$322

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Thu 8/14

5:15 am-1:20 pm

1 stop9h 05m

Lambert-St Louis

Sat 8/16

1:26 pm-8:41 pm

1 stop6h 15m

$326

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Wed 7/16

8:39 pm-4:31 pm

1 stop20h 52m

Lambert-St Louis

Thu 7/17

8:44 pm-10:57 am

1 stop13h 13m

$332

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Fri 10/24

2:40 pm-10:55 pm

2 stops9h 15m

Lambert-St Louis

Mon 10/27

9:50 am-4:30 pm

1 stop5h 40m

$352

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Showing 1-10 of 32 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 July 2, 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.

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated July 2, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from New Hampshire to St. Louis 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.
Southwest
8.0
Very good
4,272 reviews

Crew

8.6

Overall

8.0

Food

7.0

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Southwest
8.0
Very good
4,272 reviews
Southwest
8.0
Very good
4,272 reviews

Crew

8.6

Overall

8.0

Food

7.0

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Delta
8.0
Very good
7,983 reviews
Southwest
8.0
Very good
4,272 reviews

Crew

8.6

Overall

8.0

Food

7.0

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
United Airlines
7.4
Good
8,861 reviews
Southwest
8.0
Very good
4,272 reviews

Crew

8.6

Overall

8.0

Food

7.0

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,272 reviews

Crew

8.6

Overall

8.0

Food

7.0

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Sun Country Air
6.9
Okay
340 reviews
Southwest
8.0
Very good
4,272 reviews

Crew

8.6

Overall

8.0

Food

7.0

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

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.

  • 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 Spirit Airlines ($69), American Airlines ($101), and Southwest ($106).

  • 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 $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 New Hampshire?

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

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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 July 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$264Average$426FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$286Average$400FlexibilityNo cancel feeOn-time71%

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