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St. Louis

$81+ Cheap flights from New Hampshire to St. Louis (STL)

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 7/15. Fares are subject to change and may not be available on all flights or dates of travel.
MHT — STL
Jun 28 — Jul 51
Sat 6/28
Sat 7/5
1 adult, Economy
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Cheap flight deals from New Hampshire to St. Louis

Keep the following information in mind while searching for New Hampshire to St. Louis flight deals. Data was last updated June 23, 2025.

Round-trip from

$264
(American Airlines)

One-way from

$81
(Priceline)

Popular in

April

Cheapest in

September

Average price

$442
From New Hampshire to Lambert-St Louis
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One-way flight from New Hampshire to Lambert-St Louis
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Highest demand for flights based on searches. 9% potential increase in price ($42 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($8 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 New Hampshire to St. Louis

Cheapest flights from New Hampshire to St. Louis
Explore the most affordable flight options available from New Hampshire to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 23, 2025.

This American Airlines deal was found by Cheapflights users on 6/21. 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 9/97:05 amMHT - STL
1 stop9h 19mAmerican Airlines
Thu 9/114:55 pmSTL - MHT
1 stop5h 07mAmerican Airlines
Deal found 6/21$264
This Southwest deal was found by Cheapflights users on 6/21. 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 9/93:50 pmMHT - STL
2 stops7h 15mSouthwest
Thu 9/117:20 amSTL - MHT
1 stop5h 50mSouthwest
Deal found 6/21$272
This Mytrip deal was found by Cheapflights users on 6/21. 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 7/116:10 amBOS - STL
3 stops28h 30mSpirit Airlines
Sun 7/1310:47 amSTL - BOS
2 stops21h 11mSpirit Airlines
Deal found 6/21$324
This Mytrip deal was found by Cheapflights users on 6/20. 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 7/109:32 amBOS - STL
3 stops25h 20mMultiple Airlines
Thu 7/179:50 amSTL - BOS
3 stops22h 08mMultiple Airlines
Deal found 6/20$326
This American Airlines deal was found by Cheapflights users on 6/20. 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 7/128:00 amBOS - STL
Nonstop3h 08mAmerican Airlines
Sat 7/194:07 pmSTL - BOS
1 stop5h 39mAmerican Airlines
Deal found 6/20$327
This Delta deal was found by Cheapflights users on 6/20. 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.
Tue 7/152:00 pmBOS - STL
1 stop5h 08mDelta
Wed 7/162:15 pmSTL - BOS
1 stop4h 29mDelta
Deal found 6/20$331
This American Airlines deal was found by Cheapflights users on 6/22. 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 7/236:01 pmPWM - STL
1 stop6h 58mAmerican Airlines
Wed 8/66:06 amSTL - PWM
1 stop7h 56mAmerican Airlines
Deal found 6/22$332
This Delta deal was found by Cheapflights users on 6/22. 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 7/232:00 pmPWM - STL
1 stop5h 08mDelta
Wed 8/67:00 amSTL - PWM
2 stops8h 05mDelta
Deal found 6/22$340
This United Airlines deal was found by Cheapflights users on 6/23. 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.
Sat 8/307:45 amBOS - STL
1 stop8h 59mUnited Airlines
Wed 9/36:35 amSTL - BOS
2 stops13h 03mUnited Airlines
Deal found 6/23$352
This Southwest deal was found by Cheapflights users on 6/23. 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 10/85:30 amBOS - STL
2 stops9h 20mSouthwest
Sat 10/115:55 pmSTL - BOS
Nonstop2h 35mSouthwest
Deal found 6/23$360
This Southwest deal was found by Cheapflights users on 6/21. 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.
Sat 7/195:30 amPWM - STL
1 stop4h 55mSouthwest
Sat 7/265:25 amSTL - PWM
1 stop9h 50mSouthwest
Deal found 6/21$412
This United Airlines deal was found by Cheapflights users on 6/21. 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.
Fri 7/49:40 amMHT - STL
2 stops10h 51mUnited Airlines
Thu 7/101:20 pmSTL - MHT
2 stops9h 39mUnited Airlines
Deal found 6/21$487

Cheapflights Fare Finder

Customize your flight search to find flights from New Hampshire to St. Louis 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 23, 2025.
Use the filters below to find and compare flights from New Hampshire to St. Louis that are best for you.

Fly from

New Hampshire

Fly to

St. Louis

Route

Depart

Return

Price

ManchesterSt. Louis

MHT - STL

MHTSTL

Manchester

Tue 9/9

7:05 am-9:53 pm

1 stop15h 48m

Lambert-St Louis

Thu 9/11

9:07 am-5:21 pm

1 stop7h 14m

$264

ManchesterSt. Louis

MHT - STL

MHTSTL

Manchester

Tue 9/9

3:50 pm-10:05 pm

2 stops7h 15m

Lambert-St Louis

Thu 9/11

7:20 am-2:10 pm

1 stop5h 50m

$272

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Fri 7/11

6:10 am-9:40 am

3 stops28h 30m

Lambert-St Louis

Sun 7/13

10:47 am-8:58 am

2 stops21h 11m

$324

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Thu 7/10

9:32 am-9:52 am

3 stops25h 20m

Lambert-St Louis

Thu 7/17

9:50 am-8:58 am

3 stops22h 08m

$326

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Sat 7/12

8:00 am-10:08 am

Nonstop3h 08m

Lambert-St Louis

Sat 7/19

4:07 pm-10:46 pm

1 stop5h 39m

$327

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Tue 7/15

2:00 pm-6:08 pm

1 stop5h 08m

Lambert-St Louis

Wed 7/16

2:15 pm-7:44 pm

1 stop4h 29m

$331

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Wed 7/23

6:01 pm-11:59 pm

1 stop6h 58m

Lambert-St Louis

Wed 8/6

6:06 am-3:02 pm

1 stop7h 56m

$332

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Wed 7/23

2:00 pm-6:08 pm

1 stop5h 08m

Lambert-St Louis

Wed 8/6

7:00 am-4:05 pm

2 stops8h 05m

$340

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Sat 8/30

7:45 am-3:44 pm

1 stop8h 59m

Lambert-St Louis

Wed 9/3

6:35 am-8:38 pm

2 stops13h 03m

$352

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Tue 7/22

6:05 am-8:00 am

Nonstop2h 55m

Lambert-St Louis

Sun 7/27

9:00 pm-12:30 am

Nonstop2h 30m

$366

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/23

Showing 1-10 of 34 results
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Best time to book a flight from New Hampshire to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from New Hampshire 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 New Hampshire to St. Louis

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

Currently, August is the cheapest month in which you can book a flight from New Hampshire to St. Louis (average of $311). Flying from New Hampshire to St. Louis in March is currently the most expensive (average of $356). 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 NH to STL?

Find hourly flight availability from New Hampshire to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 23, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from New Hampshire to St. Louis as you normally would.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated June 23, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest and Delta from New Hampshire to St. Louis by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,278 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,966 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,831 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

Find useful and relevant information for your journey from New Hampshire to St. Louis. 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 into for flights to St. Louis from New Hampshire?

    Lambert-St Louis (STL), located 12.7 mi from the city center, is the airport you fly into when you book flights from New Hampshire to St. Louis.

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

    The cheapest airlines for a one-way flight from New Hampshire to St. Louis are Spirit Airlines ($81), American Airlines ($114), and Frontier ($134).

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

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

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from New Hampshire to St. Louis (average of $311). Flying from New Hampshire to St. Louis in March is currently the most expensive (average of $356). 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

Traveling to a place near New Hampshire?

Book flights to New Hampshire if you plan to visit one of these locations
O'Fallon
Maryland Heights
Fairview Heights
Collinsville
Eureka
St. Peters
Glencoe
Alton
Festus
Chesterfield
Farmington

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Alternative routes for New Hampshire to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from New Hampshire to St. Louis

Discover the top 2 airlines that operate flights from New Hampshire to St. Louis. 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 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$264Average$426FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$286Average$398FlexibilityNo cancel feeOn-time71%

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