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New Hampshire

$138+ 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 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MHT
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
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 July 31, 2025.

Round-trip from

$257
(Mytrip)

One-way from

$138
(American Airlines)

Popular in

June

Cheapest in

September

Average price

$441
From Lambert-St Louis to New Hampshire
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One-way flight from Lambert-St Louis to New Hampshire
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($21 potential increase over avg. RT price).
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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 July 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 July 31, 2025.

This Mytrip deal was found by Cheapflights users on 7/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1812:05 pmSTL - BOS
3 stops22h 08mSpirit Airlines
Sun 9/216:20 amBOS - STL
1 stop5h 30mSpirit Airlines
Deal found 7/29$257
This American Airlines deal was found by Cheapflights users on 7/31. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/46:00 amSTL - MHT
1 stop4h 38mAmerican Airlines
Tue 9/95:13 pmMHT - STL
1 stop6h 54mAmerican Airlines
Deal found 7/31$259
This Delta deal was found by Cheapflights users on 7/31. 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.
Mon 9/159:25 amSTL - BOS
1 stop7h 03mDelta
Tue 9/231:36 pmBOS - STL
1 stop6h 29mDelta
Deal found 7/31$260
This American Airlines deal was found by Cheapflights users on 7/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/226:00 amSTL - BOS
1 stop7h 49mAmerican Airlines
Mon 9/224:10 pmBOS - STL
Nonstop3h 05mAmerican Airlines
Deal found 7/29$261
This Mytrip deal was found by Cheapflights users on 7/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/59:50 amSTL - BOS
3 stops11h 53mMultiple Airlines
Sun 9/76:20 amBOS - STL
1 stop5h 30mMultiple Airlines
Deal found 7/29$278
This Southwest deal was found by Cheapflights users on 7/29. 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.
Wed 9/241:35 pmSTL - MHT
2 stops6h 55mSouthwest
Mon 9/297:00 amMHT - STL
1 stop6h 55mSouthwest
Deal found 7/29$286
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Mon 9/84:55 pmSTL - PWM
1 stop5h 10mAmerican Airlines
Sat 9/136:15 amPWM - STL
1 stop16h 38mAmerican Airlines
Deal found 7/30$297
This Southwest deal was found by Cheapflights users on 7/29. 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 9/911:10 amSTL - BOS
2 stops7h 00mSouthwest
Wed 9/103:15 pmBOS - STL
1 stop7h 25mSouthwest
Deal found 7/29$302
This Delta deal was found by Cheapflights users on 7/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/86:00 amSTL - PWM
1 stop5h 58mDelta
Sat 9/1311:45 amPWM - STL
2 stops11h 15mDelta
Deal found 7/29$302
This United Airlines deal was found by Cheapflights users on 7/30. 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 10/146:00 amSTL - BOS
1 stop6h 25mUnited Airlines
Tue 11/44:20 pmBOS - STL
1 stop8h 24mUnited Airlines
Deal found 7/30$317
This Southwest deal was found by Cheapflights users on 7/30. 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.
Mon 9/82:45 pmSTL - PWM
2 stops7h 35mSouthwest
Wed 9/101:50 pmPWM - STL
2 stops7h 15mSouthwest
Deal found 7/30$322
This United Airlines deal was found by Cheapflights users on 7/29. 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.
Mon 10/135:28 pmSTL - PWM
1 stop27h 16mUnited Airlines
Fri 10/173:45 pmPWM - STL
2 stops20h 04mUnited Airlines
Deal found 7/29$483

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 July 31, 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. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Thu 9/18

12:05 pm-11:13 am

3 stops22h 08m

Boston Logan Intl

Sun 9/21

6:20 am-10:50 am

1 stop5h 30m

$257

St. LouisManchester

STL - MHT

STLMHT

Lambert-St Louis

Thu 9/4

6:00 am-11:38 am

1 stop4h 38m

Manchester

Tue 9/9

5:13 pm-11:07 pm

1 stop6h 54m

$259

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Mon 9/15

9:25 am-5:28 pm

1 stop7h 03m

Boston Logan Intl

Tue 9/23

1:36 pm-7:05 pm

1 stop6h 29m

$260

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Mon 9/22

6:00 am-2:49 pm

1 stop7h 49m

Boston Logan Intl

Mon 9/22

4:10 pm-6:15 pm

Nonstop3h 05m

$261

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Fri 9/5

9:50 am-10:43 pm

3 stops11h 53m

Boston Logan Intl

Sun 9/7

6:20 am-10:50 am

1 stop5h 30m

$278

St. LouisManchester

STL - MHT

STLMHT

Lambert-St Louis

Wed 9/24

1:35 pm-9:30 pm

2 stops6h 55m

Manchester

Mon 9/29

7:00 am-12:55 pm

1 stop6h 55m

$286

St. LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Mon 9/8

4:55 pm-11:05 pm

1 stop5h 10m

Portland

Sat 9/13

6:15 am-9:53 pm

1 stop16h 38m

$297

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Tue 9/9

11:10 am-7:10 pm

2 stops7h 00m

Boston Logan Intl

Wed 9/10

3:15 pm-9:40 pm

1 stop7h 25m

$302

St. LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Mon 9/8

6:00 am-12:58 pm

1 stop5h 58m

Portland

Sat 9/13

11:45 am-10:00 pm

2 stops11h 15m

$302

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Tue 10/14

6:00 am-1:25 pm

1 stop6h 25m

Boston Logan Intl

Tue 10/28

10:40 am-3:47 pm

1 stop6h 07m

$317

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 30 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 April is currently the most expensive (average of $396). 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 July 31, 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 July 31, 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. 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
4,246 reviews

Overall

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Delta
8.0
Very good
7,981 reviews
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
United Airlines
7.4
Good
8,900 reviews
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Spirit Airlines
6.3
Okay
8,048 reviews
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

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?

    $138 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 Delta, with prices starting from $141 and $142, 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 April is currently the most expensive (average of $396). 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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$200Average$409FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$266Average$397FlexibilityNo cancel feeOn-time71%

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