HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
New Hampshire

$68+ 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 1/26. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MHT
Jan 15 — Jan 221
Thu 1/15
Thu 1/22
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to New Hampshire with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 December 16, 2025.

This Frontier deal was found by Cheapflights users on 12/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/198:37 pmSTL - BOS
1 stop12h 44mFrontier
Sat 1/1012:03 pmBOS - STL
1 stop11h 30mFrontier
Deal found 12/16$282
This American Airlines deal was found by Cheapflights users on 12/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:50 pmSTL - BOS
Nonstop2h 39mAmerican Airlines
Tue 1/612:55 pmBOS - STL
1 stop9h 20mAmerican Airlines
Deal found 12/16$288
This American Airlines deal was found by Cheapflights users on 12/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2412:50 pmSTL - BOS
Nonstop2h 39mAmerican Airlines
Thu 1/112:03 pmBOS - STL
Nonstop3h 17mAmerican Airlines
Deal found 12/15$297
This Frontier deal was found by Cheapflights users on 12/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/198:37 pmSTL - BOS
1 stop12h 44mFrontier
Mon 1/1211:41 amBOS - STL
1 stop11h 52mFrontier
Deal found 12/16$303
This Frontier deal was found by Cheapflights users on 12/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/198:37 pmSTL - BOS
1 stop12h 44mFrontier
Sun 1/116:00 amBOS - STL
1 stop9h 48mFrontier
Deal found 12/16$317
This American Airlines deal was found by Cheapflights users on 12/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2511:43 amSTL - BOS
Nonstop2h 42mAmerican Airlines
Thu 1/112:03 pmBOS - STL
Nonstop3h 17mAmerican Airlines
Deal found 12/15$320
This Delta deal was found by Cheapflights users on 12/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:55 pmSTL - BOS
1 stop4h 19mDelta
Tue 1/611:00 amBOS - STL
1 stop6h 39mDelta
Deal found 12/15$344
This Super.com deal was found by Cheapflights users on 12/15. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/204:27 pmSTL - BOS
1 stop17h 14mFrontier
Tue 12/2312:08 pmBOS - STL
1 stop11h 25mFrontier
Deal found 12/15$362
This American Airlines deal was found by Cheapflights users on 12/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:00 amSTL - MHT
1 stop6h 05mAmerican Airlines
Sun 1/46:00 amMHT - STL
1 stop8h 14mAmerican Airlines
Deal found 12/16$402
This American Airlines deal was found by Cheapflights users on 12/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/304:58 pmSTL - MHT
1 stop5h 36mAmerican Airlines
Sat 1/34:15 pmMHT - STL
1 stop5h 36mAmerican Airlines
Deal found 12/15$487
This United Airlines deal was found by Cheapflights users on 12/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/308:15 amSTL - PWM
1 stop5h 25mUnited Airlines
Sat 1/35:30 amPWM - STL
1 stop5h 38mUnited Airlines
Deal found 12/15$502
This Kiwi.com deal was found by Cheapflights users on 12/15. 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.
Tue 12/3010:48 amSTL - MHT
2 stops31h 08mMultiple Airlines
Sat 1/37:36 pmMHT - STL
1 stop27h 57mMultiple Airlines
Deal found 12/15$549

Find 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 December 16, 2025.

Most accurate provider

Gotogate
3 stars

Most trusted provider

Gotogate
3 stars

Round-trip from

$133
(Kiwi.com)

One-way from

$68
(Kiwi.com)

Popular in

November

Cheapest in

September

Average price

$427
Provider with most accurate pricing for Lambert-St Louis-Boston Logan Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Boston Logan Intl flights.
Search Deals
From Lambert-St Louis to New Hampshire
Search Deals
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).
Search Deals
Cheapest flight prices on average. 0% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 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. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Sun 1/11

5:11 pm-11:57 pm

2 stops29h 46m

Boston Logan Intl

Sun 1/18

6:00 am-6:51 am

1 stop25h 51m

$215

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Thu 1/15

5:11 pm-11:19 pm

1 stop29h 08m

Boston Logan Intl

Tue 1/20

6:00 am-6:51 am

1 stop25h 51m

$260

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Fri 12/19

8:37 pm-10:21 am

1 stop12h 44m

Boston Logan Intl

Sat 1/10

12:03 pm-10:33 pm

1 stop11h 30m

$282

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Thu 1/1

5:00 am-11:06 am

1 stop5h 06m

Boston Logan Intl

Thu 1/8

9:51 am-6:14 pm

1 stop9h 23m

$307

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Thu 12/25

4:25 pm-9:35 pm

1 stop4h 10m

Boston Logan Intl

Thu 1/1

5:15 pm-7:30 pm

Nonstop3h 15m

$307

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Thu 1/1

10:42 am-7:23 am

2 stops19h 41m

Boston Logan Intl

Thu 1/8

6:00 am-2:48 pm

1 stop9h 48m

$315

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Wed 12/24

11:05 am-5:17 pm

1 stop5h 12m

Boston Logan Intl

Thu 12/25

6:23 pm-10:43 pm

1 stop5h 20m

$317

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Wed 1/21

12:11 pm-3:50 pm

Nonstop2h 39m

Boston Logan Intl

Sat 2/7

7:00 am-6:13 pm

1 stop12h 13m

$324

St. LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Thu 2/5

6:00 am-12:05 pm

1 stop5h 05m

Portland

Thu 2/5

5:07 pm-9:51 pm

1 stop5h 44m

$333

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Tue 1/20

5:55 pm-9:25 pm

Nonstop2h 30m

Boston Logan Intl

Wed 1/21

3:20 pm-9:55 pm

2 stops7h 35m

$339

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

Showing 1-10 of 54 results
1
2
3
...
6

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, September is the cheapest month in which you can book a flight from St. Louis to New Hampshire (average of $175). Flying from St. Louis to New Hampshire in December is currently the most expensive (average of $486). 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 December 16, 2025.

It’s optimal to fly from St. Louis to New Hampshire in the evening. By choosing this option you can save up to 66% on the cost of your flight, compared to a flight in the afternoon.

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 December 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
7.9
Good
4,250 reviews

Food

7.0

Overall

7.9

Comfort

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
7.9
Good
4,250 reviews
Southwest
7.9
Good
4,250 reviews

Food

7.0

Overall

7.9

Comfort

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,049 reviews
Southwest
7.9
Good
4,250 reviews

Food

7.0

Overall

7.9

Comfort

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

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?

    Frontier, American Airlines, and Southwest can get you from St. Louis to New Hampshire in just under 4h 10m. Your travel time can differ by up to 8h 34m. St. Louis and New Hampshire are separated by a distance of 1043 mi. This flight may include one or multiple stops.

  • 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 - Manchester or Lambert-St Louis - Portland 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, September is the cheapest month in which you can book a flight from St. Louis to New Hampshire (average of $175). Flying from St. Louis to New Hampshire in December is currently the most expensive (average of $486). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to New Hampshire

See prices for flight routes from nearby airports that may be better suited for you.
St. Louis to Las Vegas flights
St. Louis to Orlando flights
Kansas City to Las Vegas flights
Kansas City to Denver flights
St. Louis to Miami flights
Kansas City to Orlando flights
St. Louis to LaGuardia flights
Kansas City to Sky Harbor Intl flights
St. Louis to Newark flights
St. Louis to Dallas/Fort Worth flights
Kansas City to John F Kennedy Intl flights
Kansas City to LaGuardia flights
St. Louis to Denver flights
St. Louis to Los Angeles flights
Kansas City to Los Angeles flights
St. Louis to Sky Harbor Intl flights
St. Louis to John F Kennedy Intl flights
Kansas City to Miami flights
Kansas City to Atlanta flights
St. Louis to Hobby flights
Kansas City to Seattle flights
St. Louis to Seattle flights
St. Louis to Fort Lauderdale flights
Kansas City to Fort Lauderdale flights
Kansas City to Newark flights
St. Louis to Honolulu flights
St. Louis to Dulles Intl flights
St. Louis to George Bush Intcntl flights
Kansas City to Hobby flights
Kansas City to Tampa flights
Kansas City to Dallas/Fort Worth flights
Kansas City to O'Hare Intl flights
St. Louis to Fort Myers flights
St. Louis to Tampa flights
Kansas City to George Bush Intcntl flights
St. Louis to Atlanta flights
St. Louis to New Orleans flights
St. Louis to San Diego flights
Kansas City to Boston flights
Kansas City to New Orleans flights
Kansas City to Nashville flights
Kansas City to Honolulu flights
St. Louis to Salt Lake City flights
St. Louis to Baltimore flights
St. Louis to Key West flights
St. Louis to San Francisco flights
St. Louis to O'Hare Intl flights
Kansas City to San Francisco flights
St. Louis to Reagan-National flights
Kansas City to San Diego flights

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 December 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$200Average$401FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$256Average$386FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.