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New Hampshire

$143+ 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 8/14. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MHT
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap 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 June 12, 2025.

Round-trip from

$267
(Southwest)

One-way from

$143
(American Airlines)

Popular in

July

Cheapest in

September

Average price

$433
From Lambert-St Louis to New Hampshire
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One-way flight from Lambert-St Louis to New Hampshire
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 0% potential price decrease ($2 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from St. Louis to New Hampshire

Cheapest flights from St. Louis to New Hampshire
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 June 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/286:00 amSTL - MHT
1 stop4h 57mAmerican Airlines
Sun 8/317:04 amMHT - STL
1 stop6h 49mAmerican Airlines
Deal found 6/11$267
This Booking.com deal was found by Cheapflights users on 6/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/85:40 pmSTL - PWM
1 stop23h 33mFrontier
Sat 8/166:58 pmPWM - STL
1 stop29h 49mFrontier
Deal found 6/10$271
This Southwest deal was found by Cheapflights users on 6/12. 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 10/27:45 amSTL - MHT
2 stops12h 05mSouthwest
Mon 10/63:45 pmMHT - STL
1 stop7h 40mSouthwest
Deal found 6/12$278
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/105:55 amSTL - PWM
1 stop4h 52mAmerican Airlines
Wed 9/176:00 amPWM - STL
1 stop5h 21mAmerican Airlines
Deal found 6/11$285
This Mytrip deal was found by Cheapflights users on 6/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/36:36 pmSTL - BOS
1 stop13h 03mSpirit Airlines
Sun 7/68:03 pmBOS - STL
1 stop23h 15mSpirit Airlines
Deal found 6/10$290
This Delta deal was found by Cheapflights users on 6/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/106:00 amSTL - PWM
1 stop5h 59mDelta
Wed 9/176:30 amPWM - STL
2 stops12h 32mDelta
Deal found 6/9$290
This FlightHub deal was found by Cheapflights users on 6/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/2011:28 amSTL - BOS
1 stop10h 28mMultiple Airlines
Fri 6/279:40 amBOS - STL
1 stop15h 13mMultiple Airlines
Deal found 6/10$293
This United Airlines deal was found by Cheapflights users on 6/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/93:20 pmSTL - PWM
1 stop5h 39mUnited Airlines
Sat 9/136:00 amPWM - STL
1 stop5h 46mUnited Airlines
Deal found 6/10$301
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/95:55 amSTL - BOS
1 stop8h 11mAmerican Airlines
Fri 9/124:10 pmBOS - STL
Nonstop3h 05mAmerican Airlines
Deal found 6/11$307
This Southwest deal was found by Cheapflights users on 6/11. 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.
Wed 7/92:50 pmSTL - BOS
Nonstop2h 35mSouthwest
Wed 7/167:00 pmBOS - STL
Nonstop3h 05mSouthwest
Deal found 6/11$315
This Mytrip deal was found by Cheapflights users on 6/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/66:36 amSTL - PWM
1 stop27h 41mSun Country Air
Sun 7/1312:46 pmPWM - STL
1 stop7h 45mSun Country Air
Deal found 6/10$318
This Delta deal was found by Cheapflights users on 6/11. 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.
Sat 8/166:40 amSTL - BOS
1 stop10h 57mDelta
Wed 8/205:15 amBOS - STL
1 stop16h 18mDelta
Deal found 6/11$321

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 June 12, 2025.
Use the filters below to find and compare flights from St. Louis to New Hampshire that are best for you.

Fly from

St. Louis

Fly to

New Hampshire

Route

Depart

Return

Price

St. LouisManchester

STL - MHT

STLMHT

Lambert-St Louis

Thu 10/2

6:30 pm-11:40 pm

1 stop4h 10m

Manchester

Mon 10/6

7:05 pm-10:45 pm

1 stop4h 40m

$267

St. LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Fri 8/8

5:40 pm-6:13 pm

1 stop23h 33m

Portland

Sat 8/16

6:58 pm-11:47 pm

1 stop29h 49m

$271

St. LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Wed 9/10

5:55 am-11:47 am

1 stop4h 52m

Portland

Wed 9/17

6:00 am-10:21 am

1 stop5h 21m

$285

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Thu 7/3

6:36 pm-8:39 am

1 stop13h 03m

Boston Logan Intl

Sun 7/6

8:03 pm-6:18 pm

1 stop23h 15m

$290

St. LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Wed 9/10

6:00 am-12:59 pm

1 stop5h 59m

Portland

Wed 9/17

6:30 am-6:02 pm

2 stops12h 32m

$290

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Fri 6/20

11:28 am-10:56 pm

1 stop10h 28m

Boston Logan Intl

Fri 6/27

9:40 am-11:53 pm

1 stop15h 13m

$293

St. LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Tue 9/9

3:20 pm-9:59 pm

1 stop5h 39m

Portland

Sat 9/13

6:00 am-10:46 am

1 stop5h 46m

$301

St. LouisManchester

STL - MHT

STLMHT

Lambert-St Louis

Mon 8/11

6:02 am-2:12 pm

1 stop7h 10m

Manchester

Sun 8/17

5:40 am-12:11 pm

1 stop7h 31m

$303

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Tue 9/9

5:55 am-3:06 pm

1 stop8h 11m

Boston Logan Intl

Fri 9/12

4:10 pm-6:15 pm

Nonstop3h 05m

$307

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Wed 7/9

2:50 pm-6:25 pm

Nonstop2h 35m

Boston Logan Intl

Wed 7/16

7:00 pm-9:05 pm

Nonstop3h 05m

$315

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 34 results
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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.
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

What is the cheapest month to book a flight from St. Louis to New Hampshire?

Currently, January is the cheapest month in which you can book a flight from St. Louis to New Hampshire (average of $334). Flying from St. Louis to New Hampshire in July is currently the most expensive (average of $399). 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 STL to NH?

Find hourly flight availability from St. Louis to New Hampshire. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

When flying from St. Louis to New Hampshire, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 June 12, 2025.
Get a feel of what it's like to fly with Southwest, Delta and United Airlines from St. Louis to New Hampshire by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,287 reviews

Boarding

8.2

Comfort

8.0

Food

7.1

Overall

8.0

Entertainment

7.6

Crew

8.6

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
4,287 reviews
Southwest
8.0
Very good
4,287 reviews

Boarding

8.2

Comfort

8.0

Food

7.1

Overall

8.0

Entertainment

7.6

Crew

8.6

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
7,950 reviews
Southwest
8.0
Very good
4,287 reviews

Boarding

8.2

Comfort

8.0

Food

7.1

Overall

8.0

Entertainment

7.6

Crew

8.6

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
8,790 reviews
Southwest
8.0
Very good
4,287 reviews

Boarding

8.2

Comfort

8.0

Food

7.1

Overall

8.0

Entertainment

7.6

Crew

8.6

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
4,287 reviews

Boarding

8.2

Comfort

8.0

Food

7.1

Overall

8.0

Entertainment

7.6

Crew

8.6

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
345 reviews
Southwest
8.0
Very good
4,287 reviews

Boarding

8.2

Comfort

8.0

Food

7.1

Overall

8.0

Entertainment

7.6

Crew

8.6

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 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.

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

    For a flight from St. Louis to New Hampshire, you will be flying from Lambert-St Louis. Lambert-St Louis (STL) is just 12.7 mi from the center of the city.

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

    $143 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Spirit Airlines and United Airlines, with prices starting from $164 and $168, respectively.

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

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

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to New Hampshire 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 St. Louis to New Hampshire?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to New Hampshire (average of $334). Flying from St. Louis to New Hampshire in July is currently the most expensive (average of $399). 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

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Alternative routes for St. Louis to New Hampshire

See prices for flight routes from nearby airports that may be better suited for you.
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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$286Average$386FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$292Average$423FlexibilityNo cancel feeOn-time63%

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