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Cheap flights from New Hampshire to St. Louis from $61

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from New Hampshire to St. Louis departing on 1/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from New Hampshire to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
4:53 pm - 8:47 pmPWM-STL
4h 54m1 stop
Delta Logo
5:15 pm - 11:21 pmSTL-PWM
5h 06m1 stop
$299Delta
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Wed, Dec 3 - Wed, Dec 10
Southwest Logo
5:00 am - 9:35 amMHT-STL
5h 35m1 stop
Southwest Logo
1:15 pm - 8:35 pmSTL-MHT
6h 20m1 stop
$299Southwest
Find Deal
Mon, Jan 19 - Wed, Jan 21
Delta Logo
6:00 am - 1:02 pmPWM-STL
8h 02m2 stops
Delta Logo
5:15 pm - 11:21 pmSTL-PWM
5h 06m1 stop
$304Delta
Find Deal
Wed, Dec 3 - Wed, Dec 10
Multiple Airlines Logo
9:55 am - 9:07 amBOS-STL
48h 12m2 stops
Multiple Airlines Logo
7:24 pm - 4:50 pmSTL-BOS
20h 26m1 stop
$317Multiple Airlines
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Mon, Nov 17 - Wed, Nov 19
United Airlines Logo
6:00 am - 12:15 pmBOS-STL
7h 15m1 stop
United Airlines Logo
6:42 pm - 2:20 pmSTL-BOS
18h 38m1 stop
$318United Airlines
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Tue, Dec 9 - Fri, Dec 12
Multiple Airlines Logo
5:45 am - 11:57 pmBOS-STL
19h 12m2 stops
Multiple Airlines Logo
12:04 pm - 10:22 amSTL-BOS
21h 18m1 stop
$320Multiple Airlines
Find Deal
Mon, Dec 1 - Thu, Dec 4
American Airlines Logo
6:36 am - 4:23 pmBOS-STL
10h 47m1 stop
American Airlines Logo
10:01 am - 1:43 pmSTL-BOS
2h 42mnonstop
$322American Airlines
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Wed, Dec 31 - Sat, Jan 3
United Airlines Logo
5:30 am - 12:15 pmBOS-STL
7h 45m2 stops
United Airlines Logo
6:42 pm - 2:20 pmSTL-BOS
18h 38m1 stop
$323United Airlines
Find Deal
Tue, Dec 9 - Fri, Dec 12
American Airlines Logo
5:07 pm - 9:51 pmPWM-STL
5h 44m1 stop
American Airlines Logo
6:00 am - 12:06 pmSTL-PWM
5h 06m1 stop
$323American Airlines
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Mon, Jan 19 - Wed, Jan 21
Frontier Logo
6:00 am - 2:29 pmBOS-STL
9h 29m1 stop
Frontier Logo
3:30 pm - 9:27 amSTL-BOS
16h 57m1 stop
$331Frontier
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Thu, Nov 27 - Sat, Dec 6

Frontier flights from New Hampshire to St. Louis

Our best Frontier deals on New Hampshire to St. Louis flight tickets
Frontier
Nov 27
BOS6:00 amBoston Logan Intl
9h 29m
1 stop
STL2:29 pmLambert-St Louis
Dec 6
STL3:30 pmLambert-St Louis
16h 57m
1 stop
BOS9:27 amBoston Logan Intl
$331
Find similar
Frontier
Nov 14
BOS9:55 amBoston Logan Intl
7h 06m
1 stop
STL4:01 pmLambert-St Louis
Nov 16
STL2:12 pmLambert-St Louis
17h 16m
1 stop
BOS8:28 amBoston Logan Intl
$416
Find similar
Frontier
Nov 10
BOS9:55 amBoston Logan Intl
48h 12m
2 stops
STL9:07 amLambert-St Louis
Nov 14
STL4:56 pmLambert-St Louis
16h 52m
1 stop
BOS10:48 amBoston Logan Intl
$441
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American Airlines flights from New Hampshire to St. Louis

Our best American Airlines deals on New Hampshire to St. Louis flight tickets
American Airlines
Dec 31
BOS6:36 amBoston Logan Intl
10h 47m
1 stop
STL4:23 pmLambert-St Louis
Jan 3
STL10:01 amLambert-St Louis
2h 42m
BOS1:43 pmBoston Logan Intl
$322
Find similar
American Airlines
Jan 19
PWM5:07 pmPortland
5h 44m
1 stop
STL9:51 pmLambert-St Louis
Jan 21
STL6:00 amLambert-St Louis
5h 06m
1 stop
PWM12:06 pmPortland
$323
Find similar
American Airlines
Jan 6
MHT5:01 pmManchester
5h 50m
1 stop
STL9:51 pmLambert-St Louis
Jan 9
STL11:05 amLambert-St Louis
10h 53m
2 stops
MHT10:58 pmManchester
$324
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated November 6, 2025.
Use the filters below to find and compare flights from New Hampshire to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Wed 12/3

4:53 pm-8:47 pm

1 stop4h 54m

Lambert-St Louis

Wed 12/10

5:15 pm-11:21 pm

1 stop5h 06m

$299

ManchesterSt. Louis

MHT - STL

MHTSTL

Manchester

Mon 1/19

5:00 am-9:35 am

1 stop5h 35m

Lambert-St Louis

Wed 1/21

1:15 pm-8:35 pm

1 stop6h 20m

$299

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Wed 12/3

6:00 am-1:02 pm

2 stops8h 02m

Lambert-St Louis

Wed 12/10

5:15 pm-11:21 pm

1 stop5h 06m

$304

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Mon 11/17

9:55 am-9:07 am

2 stops48h 12m

Lambert-St Louis

Wed 11/19

7:24 pm-4:50 pm

1 stop20h 26m

$317

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Tue 12/9

6:00 am-12:15 pm

1 stop7h 15m

Lambert-St Louis

Fri 12/12

6:42 pm-2:20 pm

1 stop18h 38m

$318

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Mon 12/1

5:45 am-11:57 pm

2 stops19h 12m

Lambert-St Louis

Thu 12/4

12:04 pm-10:22 am

1 stop21h 18m

$320

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Wed 12/31

6:36 am-4:23 pm

1 stop10h 47m

Lambert-St Louis

Sat 1/3

10:01 am-1:43 pm

Nonstop2h 42m

$322

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Tue 12/9

5:30 am-12:15 pm

2 stops7h 45m

Lambert-St Louis

Fri 12/12

6:42 pm-2:20 pm

1 stop18h 38m

$323

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Mon 1/19

5:07 pm-9:51 pm

1 stop5h 44m

Lambert-St Louis

Wed 1/21

6:00 am-12:06 pm

1 stop5h 06m

$323

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Thu 11/27

6:00 am-2:29 pm

1 stop9h 29m

Lambert-St Louis

Sat 12/6

3:30 pm-9:27 am

1 stop16h 57m

$331

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to St. Louis from

How to get the cheapest flight ticket from New Hampshire to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to St. Louis?

In general, August is the cheapest month to fly from New Hampshire to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $382. The month of September is another great option to travel to St. Louis, with average flight prices from New Hampshire averaging around $393.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Wednesday when prices can be found for as low as $422. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $501. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from New Hampshire in the evening is the least expensive time of day to depart. momondo users have found prices as low as $432 when looking at flights departing in the evening. At noon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $457 per ticket.

How far in advance should I book a flight to St. Louis?

You are more likely to see cheaper flights to St. Louis from New Hampshire when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $444 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from New Hampshire for as low as $392 on momondo.

Can stopping save me money on New Hampshire to St. Louis flights?

You could potentially save up to 23% on your flight if you consider stops on a New Hampshire to St. Louis flight.

Cheap New Hampshire to St. Louis flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from New Hampshire to St. Louis

Fastest flight time

3h 00m

Direct flights

Every day

Airports in St. Louis

1 airport
The fastest flight from New Hampshire to St. Louis takes 3h 00m
Direct flights go from New Hampshire to St. Louis every day.
There is 1 airport near St. Louis: Lambert-St Louis (STL)
Search flight deals

  • When did momondo last update prices for flights from New Hampshire to Lambert-St Louis Airport?

    Prices for flights from New Hampshire to Lambert-St Louis Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from New Hampshire to Lambert-St Louis Airport?

  • How old do you have to be to fly from New Hampshire to Lambert-St Louis Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from New Hampshire to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from New Hampshire to St. Louis

Compare and see reviews for airlines that fly from New Hampshire to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
SouthwestPriceFrom $264Free CancellationRating
8.0
4,241 reviews
Search Southwest flights
American AirlinesPriceFrom $278Free CancellationRating
7.2
11,040 reviews
Search American Airlines flights

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Florissant
Maryland Heights
O'Fallon
Wentzville
Fenton
Collinsville
St. Peters
Alton
Farmington
Festus
Glencoe
Edwardsville
Clayton
Eureka
Litchfield
Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from New Hampshire to St. Louis?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from New Hampshire to St. Louis. momondo saves you time and could save you money on your trip.

Can I find flights from New Hampshire to St. Louis with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to St. Louis from New Hampshire with this policy.

How can momondo help me find flights from New Hampshire to St. Louis?

momondo helps you find the best flight between New Hampshire and St. Louis by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from New Hampshire to St. Louis right now. Can momondo alert me if prices change?

Yes. momondo can track prices for New Hampshire to St. Louis flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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