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Cheap flights from St. Louis to New Hampshire from $87

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to New Hampshire departing on 8/31. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from St. Louis to New Hampshire

Cheap round-trip flights

Spirit Airlines Logo
2:30 pm - 10:34 pmSTL-BOS
7h 04m1 stop
Spirit Airlines Logo
6:30 am - 1:32 pmBOS-STL
8h 02m1 stop
$169Spirit Airlines
Find Deal
Mon, Aug 25 - Sun, Aug 31
American Airlines Logo
6:10 am - 3:06 pmSTL-BOS
7h 56m1 stop
American Airlines Logo
11:28 am - 8:32 pmBOS-STL
10h 04m1 stop
$171American Airlines
Find Deal
Sat, Sep 20 - Sat, Sep 27
Spirit Airlines Logo
2:30 pm - 10:34 pmSTL-BOS
7h 04m1 stop
Spirit Airlines Logo
6:30 am - 1:32 pmBOS-STL
8h 02m1 stop
$197Spirit Airlines
Find Deal
Fri, Aug 29 - Sun, Aug 31
Southwest Logo
2:15 pm - 10:15 pmSTL-MHT
7h 00m1 stop
Southwest Logo
9:15 am - 12:45 pmMHT-STL
4h 30m1 stop
$204Southwest
Find Deal
Tue, Sep 2 - Tue, Sep 9
Logo
2:02 pm - 8:35 amSTL-BOS
17h 33m1 stop
Logo
6:30 am - 1:32 pmBOS-STL
8h 02m1 stop
$204
Find Deal
Thu, Aug 21 - Mon, Aug 25
Southwest Logo
2:15 pm - 10:15 pmSTL-MHT
7h 00m1 stop
Southwest Logo
5:20 am - 11:30 amMHT-STL
7h 10m2 stops
$209Southwest
Find Deal
Wed, Sep 3 - Sat, Sep 6
Logo
2:02 pm - 8:35 amSTL-BOS
17h 33m1 stop
Logo
6:30 am - 1:32 pmBOS-STL
8h 02m1 stop
$222
Find Deal
Thu, Aug 21 - Thu, Aug 28
Frontier Logo
3:16 pm - 12:08 pmSTL-BOS
19h 52m1 stop
Frontier Logo
12:53 pm - 1:07 pmBOS-STL
25h 14m1 stop
$235Frontier
Find Deal
Fri, Aug 22 - Sat, Aug 30
Delta Logo
5:11 pm - 12:03 amSTL-PWM
5h 52m1 stop
Delta Logo
6:00 am - 4:37 pmPWM-STL
11h 37m2 stops
$256Delta
Find Deal
Wed, Sep 10 - Wed, Sep 17
Delta Logo
10:45 am - 12:03 amSTL-PWM
12h 18m2 stops
Delta Logo
6:00 am - 1:20 pmPWM-STL
8h 20m2 stops
$261Delta
Find Deal
Wed, Sep 10 - Wed, Sep 17

Spirit Airlines flights from St. Louis to New Hampshire

Our best Spirit Airlines deals on St. Louis to New Hampshire flight tickets
Spirit Airlines
Aug 25
STL2:30 pmLambert-St Louis
7h 04m
1 stop
BOS10:34 pmBoston Logan Intl
Aug 31
BOS6:30 amBoston Logan Intl
8h 02m
1 stop
STL1:32 pmLambert-St Louis
$169
Find similar
Spirit Airlines
Aug 29
STL2:30 pmLambert-St Louis
7h 04m
1 stop
BOS10:34 pmBoston Logan Intl
Aug 31
BOS6:30 amBoston Logan Intl
8h 02m
1 stop
STL1:32 pmLambert-St Louis
$197
Find similar
Spirit Airlines
Aug 22
STL2:30 pmLambert-St Louis
7h 04m
1 stop
BOS10:34 pmBoston Logan Intl
Aug 24
BOS6:30 amBoston Logan Intl
8h 02m
1 stop
STL1:32 pmLambert-St Louis
$207
Find similar

American Airlines flights from St. Louis to New Hampshire

Our best American Airlines deals on St. Louis to New Hampshire flight tickets
American Airlines
Sep 20
STL6:10 amLambert-St Louis
7h 56m
1 stop
BOS3:06 pmBoston Logan Intl
Sep 27
BOS11:28 amBoston Logan Intl
10h 04m
1 stop
STL8:32 pmLambert-St Louis
$171
Find similar
American Airlines
Aug 27
STL6:06 amLambert-St Louis
8h 13m
1 stop
BOS3:19 pmBoston Logan Intl
Aug 31
BOS5:28 amBoston Logan Intl
8h 25m
1 stop
STL12:53 pmLambert-St Louis
$199
Find similar
American Airlines
Aug 26
STL7:23 amLambert-St Louis
8h 27m
1 stop
BOS4:50 pmBoston Logan Intl
Aug 31
BOS5:28 amBoston Logan Intl
8h 25m
1 stop
STL12:53 pmLambert-St Louis
$206
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated August 7, 2025.
Use the filters below to find and compare flights from St. Louis to New Hampshire that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Mon 8/25

2:30 pm-10:34 pm

1 stop7h 04m

Boston Logan Intl

Sun 8/31

6:30 am-1:32 pm

1 stop8h 02m

$169

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Sat 9/20

6:10 am-3:06 pm

1 stop7h 56m

Boston Logan Intl

Sat 9/27

11:28 am-8:32 pm

1 stop10h 04m

$171

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Fri 8/29

2:30 pm-10:34 pm

1 stop7h 04m

Boston Logan Intl

Sun 8/31

6:30 am-1:32 pm

1 stop8h 02m

$197

St. LouisManchester

STL - MHT

STLMHT

Lambert-St Louis

Tue 9/2

2:15 pm-10:15 pm

1 stop7h 00m

Manchester

Tue 9/9

9:15 am-12:45 pm

1 stop4h 30m

$204

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Thu 8/21

2:02 pm-8:35 am

1 stop17h 33m

Boston Logan Intl

Mon 8/25

6:30 am-1:32 pm

1 stop8h 02m

$204

St. LouisManchester

STL - MHT

STLMHT

Lambert-St Louis

Wed 9/3

2:15 pm-10:15 pm

1 stop7h 00m

Manchester

Sat 9/6

5:20 am-11:30 am

2 stops7h 10m

$209

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Thu 8/21

2:02 pm-8:35 am

1 stop17h 33m

Boston Logan Intl

Thu 8/28

6:30 am-1:32 pm

1 stop8h 02m

$222

St. LouisBoston

STL - BOS

STLBOS

Lambert-St Louis

Fri 8/22

3:16 pm-12:08 pm

1 stop19h 52m

Boston Logan Intl

Sat 8/30

12:53 pm-1:07 pm

1 stop25h 14m

$235

St. LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Wed 9/10

5:11 pm-12:03 am

1 stop5h 52m

Portland

Wed 9/17

6:00 am-4:37 pm

2 stops11h 37m

$256

St. LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Wed 9/10

10:45 am-12:03 am

2 stops12h 18m

Portland

Wed 9/17

6:00 am-1:20 pm

2 stops8h 20m

$261

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 New Hampshire from

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

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 New Hampshire?

The month of August is another great option to travel to New Hampshire, with average flight prices from St. Louis averaging around $382.

What is the cheapest day to depart on your flight to New Hampshire?

The cheapest day to depart on your flight to New Hampshire is on a Thursday when prices can be found for as low as $493. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to New Hampshire is Saturday, with ticket prices averaging around $816.

What is the cheapest time of day to depart on your flight to New Hampshire?

According to our data, the cheapest time of day to fly to New Hampshire is in the afternoon. momondo users have found flights departing from St. Louis to New Hampshire in the afternoon for as low as $421. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Try not to purchase tickets at noon because they tend to be around $1,071. Of course, these prices can vary depending on the time of year and what airport you fly to.

How far in advance should I book a flight to New Hampshire?

You are more likely to see cheaper flights to New Hampshire from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to New Hampshire for around $421 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to New Hampshire from St. Louis for as low as $354 on momondo.

Cheap St. Louis to New Hampshire flight deals and tips

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

Best Price Found

$87

Fastest flight time

2h 30m

Direct flights

Every day

Airports in New Hampshire

3 airports
The best one-way flight to New Hampshire from St. Louis in the past 72 hours is $87. The best round-trip flight deal from St. Louis to New Hampshire found on momondo in the last 72 hours is $169.
The fastest flight from St. Louis to New Hampshire takes 2h 30m
Direct flights go from St. Louis to New Hampshire every day.
There are 3 airports near New Hampshire: Boston Logan Intl (BOS), Portland (PWM), Manchester (MHT)
Search flight deals

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

    Prices for flights from Lambert-St Louis Airport to New Hampshire refresh daily.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to New Hampshire.

  • What documentation or ID do you need to fly to New Hampshire?

    The travel and health documents you'll need for your trip to New Hampshire may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at New Hampshire. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from St. Louis to New Hampshire

Compare and see reviews for airlines that fly from St. Louis to New Hampshire with momondo
Airline
Rating
Free Cancellation
Price
SouthwestPriceFrom $200Free CancellationRating
8.0
4,244 reviews
Search Southwest flights
American AirlinesPriceFrom $266Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to New Hampshire. Millions of users trust and use momondo every year so you are in good hands.

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

momondo does allow users to show only those flights to New Hampshire from St. Louis which offer a flexible booking policy as well as other useful filters and features.

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

Once you have performed a search for St. Louis to New Hampshire flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes. momondo can track prices for St. Louis to New Hampshire 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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