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New Hampshire

$47+ 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 12/23. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MHT
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
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 October 30, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$287
(American Airlines)

One-way from

$47
(Kiwi.com)

Popular in

October

Cheapest in

September

Average price

$476
Provider with most accurate pricing for Lambert-St Louis-Boston Logan Intl flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Boston Logan Intl flights.
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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. 0% potential increase in price ($1 potential increase over avg. RT price).
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Cheapest flight prices on average. 0% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in October 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 October 30, 2025.

This American Airlines deal was found by Cheapflights users on 10/29. 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.
Tue 12/96:00 amSTL - MHT
1 stop4h 47mAmerican Airlines
Tue 12/93:52 pmMHT - STL
1 stop5h 46mAmerican Airlines
Deal found 10/29$287
This Southwest deal was found by Cheapflights users on 10/29. 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 12/98:25 amSTL - MHT
2 stops7h 10mSouthwest
Tue 12/95:35 pmMHT - STL
1 stop5h 45mSouthwest
Deal found 10/29$292
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Fri 12/196:58 pmSTL - BOS
1 stop14h 23mFrontier
Sat 1/1011:47 amBOS - STL
1 stop11h 46mFrontier
Deal found 10/28$293
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Fri 12/196:58 pmSTL - BOS
1 stop14h 03mMultiple Airlines
Thu 1/811:47 amBOS - STL
1 stop21h 03mMultiple Airlines
Deal found 10/28$301
This American Airlines deal was found by Cheapflights users on 10/28. 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.
Sat 12/132:54 pmSTL - BOS
Nonstop2h 38mAmerican Airlines
Tue 12/1612:10 pmBOS - STL
1 stop9h 14mAmerican Airlines
Deal found 10/28$303
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Sat 12/207:43 pmSTL - BOS
2 stops13h 25mFrontier
Sat 1/1011:47 amBOS - STL
1 stop11h 46mFrontier
Deal found 10/28$304
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Sat 12/137:43 pmSTL - BOS
2 stops13h 39mFrontier
Sun 12/1412:57 pmBOS - STL
1 stop10h 36mFrontier
Deal found 10/28$305
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Mon 12/14:13 pmSTL - BOS
1 stop23h 37mMultiple Airlines
Wed 12/39:54 pmBOS - STL
1 stop14h 13mMultiple Airlines
Deal found 10/28$306
This Kiwi.com deal was found by Cheapflights users on 10/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/198:37 pmSTL - BOS
2 stops37h 50mMultiple Airlines
Sun 1/116:15 amBOS - STL
1 stop17h 18mMultiple Airlines
Deal found 10/30$307
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Fri 12/53:30 pmSTL - BOS
1 stop17h 31mMultiple Airlines
Mon 12/88:11 pmBOS - STL
1 stop27h 22mMultiple Airlines
Deal found 10/28$309
This Mytrip deal was found by Cheapflights users on 10/27. 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 11/2010:53 amSTL - BOS
1 stop12h 00mMultiple Airlines
Mon 11/2411:04 pmBOS - STL
3 stops20h 32mMultiple Airlines
Deal found 10/27$311
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Sat 12/204:27 pmSTL - BOS
1 stop17h 14mMultiple Airlines
Mon 1/126:57 pmBOS - STL
2 stops24h 39mMultiple Airlines
Deal found 10/28$312

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 October 30, 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

Tue 12/9

6:00 am-11:47 am

1 stop4h 47m

Manchester

Tue 12/9

3:52 pm-8:38 pm

1 stop5h 46m

$287

St. LouisManchester

STL - MHT

STLMHT

Lambert-St Louis

Wed 1/14

6:00 am-11:35 am

1 stop4h 35m

Manchester

Wed 1/14

5:01 pm-9:51 pm

1 stop5h 50m

$287

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Thu 1/15

12:01 pm-3:40 pm

Nonstop2h 39m

Boston Logan Intl

Sun 1/18

9:51 am-6:14 pm

1 stop9h 23m

$298

St. LouisManchester

STL - MHT

STLMHT

Lambert-St Louis

Wed 1/14

6:50 am-12:10 pm

1 stop4h 20m

Manchester

Wed 1/14

3:25 pm-9:55 pm

2 stops7h 30m

$322

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Thu 11/27

2:00 pm-5:30 pm

Nonstop2h 30m

Boston Logan Intl

Thu 12/4

10:20 am-12:25 pm

Nonstop3h 05m

$328

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Thu 12/4

1:50 pm-5:20 pm

Nonstop2h 30m

Boston Logan Intl

Mon 12/8

5:15 pm-7:30 pm

Nonstop3h 15m

$349

St. LouisManchester

STL - MHT

STLMHT

Lambert-St Louis

Thu 12/11

1:50 pm-9:05 pm

1 stop6h 15m

Manchester

Fri 12/12

2:05 pm-9:30 pm

2 stops8h 25m

$352

St. LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Fri 12/5

9:40 am-2:55 pm

1 stop4h 15m

Portland

Tue 12/9

3:30 pm-10:00 pm

1 stop7h 30m

$353

St. LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Tue 12/23

2:04 pm-10:51 pm

1 stop7h 47m

Portland

Thu 1/1

5:20 pm-9:45 pm

1 stop5h 25m

$359

St. LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Wed 11/26

1:55 pm-10:19 pm

1 stop7h 24m

Portland

Wed 12/3

4:53 pm-8:47 pm

1 stop4h 54m

$363

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 58 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, 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 March is currently the most expensive (average of $443). 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 October 30, 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.

How much does it cost to fly round-trip from St. Louis to New Hampshire?

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 October 30, 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
4,243 reviews

Comfort

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

Crew

8.6

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
4,243 reviews
Southwest
8.0
Very good
4,243 reviews

Comfort

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

Crew

8.6

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
11,035 reviews
Southwest
8.0
Very good
4,243 reviews

Comfort

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

Crew

8.6

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?

    American Airlines, Southwest, and Delta can get you from St. Louis to New Hampshire in just under 4h 20m. Your travel time can differ by up to 3h 04m. St. Louis and New Hampshire are separated by a distance of 1028 mi. This flight may include one or multiple stops.

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

    $79 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Delta and American Airlines, with prices starting from $169 and $184, 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, 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 March is currently the most expensive (average of $443). 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$200Average$398FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$256Average$386FlexibilityNo cancel feeOn-time71%

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