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New Hampshire

$93+ 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 10/23. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MHT
oct. 16 — oct. 231
jue. 10/16
jue. 10/23
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 septiembre 16, 2025.

Round-trip from

$250
(Kiwi.com)

One-way from

$93
(Expedia)

Popular in

April

Cheapest in

September

Average price

$391
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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Highest demand for flights based on searches. 3% potential increase in price ($15 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 September 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 septiembre 16, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/510:57 amSTL - BOS
1 stop23h 29mMultiple Airlines
jue. 10/912:22 pmBOS - STL
2 stops23h 15mMultiple Airlines
Deal found 9/15$250
This Kiwi.com deal was found by Cheapflights users on 9/14. 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.
dom. 10/1910:57 amSTL - BOS
1 stop23h 29mMultiple Airlines
jue. 10/238:24 pmBOS - STL
2 stops14h 52mMultiple Airlines
Deal found 9/14$251
This Kiwi.com deal was found by Cheapflights users on 9/16. 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.
jue. 11/612:20 pmSTL - BOS
1 stop11h 20mMultiple Airlines
lun. 11/1012:20 pmBOS - STL
2 stops21h 47mMultiple Airlines
Deal found 9/16$252
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/1711:32 amSTL - BOS
2 stops11h 27mMultiple Airlines
sáb. 10/1812:31 pmBOS - STL
1 stop22h 31mMultiple Airlines
Deal found 9/15$253
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/37:55 pmSTL - BOS
2 stops16h 53mMultiple Airlines
mié. 10/86:16 amBOS - STL
1 stop28h 46mMultiple Airlines
Deal found 9/15$254
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/64:00 pmSTL - BOS
2 stops18h 26mMultiple Airlines
jue. 10/99:50 amBOS - STL
1 stop25h 47mMultiple Airlines
Deal found 9/15$255
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/17:55 pmSTL - BOS
2 stops13h 03mFrontier
jue. 10/99:50 amBOS - STL
1 stop25h 47mFrontier
Deal found 9/15$256
This Kiwi.com deal was found by Cheapflights users on 9/14. 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.
jue. 10/1610:57 amSTL - BOS
1 stop12h 02mMultiple Airlines
sáb. 10/256:17 amBOS - STL
2 stops28h 05mMultiple Airlines
Deal found 9/14$258
This Kiwi.com deal was found by Cheapflights users on 9/14. 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.
sáb. 10/187:15 pmSTL - BOS
1 stop15h 11mSpirit Airlines
sáb. 10/252:15 pmBOS - STL
2 stops20h 47mSpirit Airlines
Deal found 9/14$259
This American Airlines deal was found by Cheapflights users on 9/13. 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.
mié. 10/297:00 pmSTL - BOS
Nonstop2h 37mAmerican Airlines
mar. 11/116:48 amBOS - STL
1 stop9h 14mAmerican Airlines
Deal found 9/13$260
This American Airlines deal was found by Cheapflights users on 9/14. 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.
mié. 10/296:00 amSTL - BOS
1 stop8h 04mAmerican Airlines
mié. 11/57:45 amBOS - STL
Nonstop3h 25mAmerican Airlines
Deal found 9/14$261
This American Airlines deal was found by Cheapflights users on 9/14. 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.
mié. 12/179:53 amSTL - BOS
1 stop8h 06mAmerican Airlines
vie. 1/94:10 pmBOS - STL
1 stop8h 39mAmerican Airlines
Deal found 9/14$262

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 septiembre 16, 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

lun. 11/17

9:45 am-4:35 pm

1 stop5h 50m

Manchester

mié. 11/26

5:55 pm-11:50 pm

1 stop6h 55m

$307

St. LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

mar. 10/21

8:30 am-2:38 pm

1 stop5h 08m

Portland

lun. 10/27

6:00 am-9:56 am

1 stop4h 56m

$312

St. LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

lun. 11/17

2:36 pm-11:19 pm

2 stops7h 43m

Portland

mar. 11/18

6:00 am-4:07 pm

2 stops11h 07m

$322

St. LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

sáb. 10/18

7:16 am-10:45 pm

1 stop14h 29m

Portland

sáb. 10/25

5:59 pm-11:58 pm

1 stop6h 59m

$322

St. LouisManchester

STL - MHT

STLMHT

Lambert-St Louis

mié. 11/26

6:20 am-5:15 pm

1 stop9h 55m

Manchester

vie. 11/28

5:20 pm-11:15 pm

1 stop6h 55m

$322

St. LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

jue. 11/6

2:08 pm-10:37 pm

1 stop7h 29m

Portland

sáb. 11/8

3:52 pm-9:00 pm

1 stop6h 08m

$327

St. LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

jue. 11/6

6:00 am-12:22 pm

1 stop5h 22m

Portland

sáb. 11/8

2:38 pm-8:33 pm

2 stops6h 55m

$332

St. LouisManchester

STL - MHT

STLMHT

Lambert-St Louis

vie. 11/7

5:06 pm-10:57 pm

1 stop4h 51m

Manchester

lun. 11/10

4:04 pm-9:00 pm

1 stop5h 56m

$337

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

mar. 10/28

8:55 am-5:45 pm

2 stops7h 50m

Boston Logan Intl

mié. 10/29

3:20 pm-7:50 pm

1 stop5h 30m

$342

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

sáb. 2/21

8:00 am-11:30 am

Nonstop2h 30m

Boston Logan Intl

mar. 2/24

5:30 pm-9:55 pm

1 stop5h 25m

$343

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 53 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 $398). 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 septiembre 16, 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 septiembre 16, 2025.
Get a feel of what it's like to fly with Southwest and American 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
4,242 reviews

Entertainment

7.5

Crew

8.6

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Crew

8.6

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Crew

8.6

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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.

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

    Southwest, American Airlines, and Delta can get you from St. Louis to New Hampshire in just under 5h 08m. Your travel time can differ by up to 2h 35m. St. Louis and New Hampshire are separated by a distance of 1092 mi. This flight may include one or multiple stops.

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

    $95 is the cheapest one-way deal found within the past few days, from Spirit Airlines. You may also be able to find cheap deals on American Airlines and Southwest, with prices starting from $144 and $149, 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 $398). 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 septiembre 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$200Average$399FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$256Average$387FlexibilityNo cancel feeOn-time71%

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