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Cheap flights from St. Louis to Boston from $120

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 Boston departing on 4/28. 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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0 bags

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Find the cheapest flights from St. Louis to Boston

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
1:45 pm - 9:05 pm
STL
-
MHT
6h 20m
1 stop
Southwest Logo
7:30 am - 11:30 am
MHT
-
STL
5h 00m
1 stop
$307Southwest
Tue, May 5 - Tue, May 12
American Airlines Logo
5:51 am - 11:42 am
STL
-
MHT
4h 51m
1 stop
American Airlines Logo
5:41 pm - 11:56 pm
MHT
-
STL
7h 15m
1 stop
$311American Airlines
Fri, May 15 - Mon, May 18
Southwest Logo
3:55 pm - 9:05 pm
STL
-
MHT
4h 10m
1 stop
Southwest Logo
3:45 pm - 10:10 pm
MHT
-
STL
7h 25m
2 stops
$312Southwest
Tue, May 5 - Tue, May 12
Southwest Logo
5:35 pm - 11:05 pm
STL
-
MHT
4h 30m
1 stop
Southwest Logo
7:10 pm - 10:45 pm
MHT
-
STL
4h 35m
1 stop
$357Southwest
Sat, May 16 - Fri, May 22
Southwest Logo
4:40 pm - 9:55 pm
STL
-
MHT
4h 15m
1 stop
Southwest Logo
4:40 pm - 11:25 pm
MHT
-
STL
7h 45m
1 stop
$367Southwest
Mon, May 4 - Mon, May 11
Southwest Logo
1:45 pm - 9:55 pm
STL
-
MHT
7h 10m
1 stop
Southwest Logo
3:15 pm - 10:55 pm
MHT
-
STL
8h 40m
2 stops
$372Southwest
Mon, May 4 - Mon, May 11
Southwest Logo
1:45 pm - 10:30 pm
STL
-
MHT
7h 45m
2 stops
Southwest Logo
9:10 am - 6:00 pm
MHT
-
STL
9h 50m
2 stops
$377Southwest
Wed, May 27 - Tue, Jun 2
Southwest Logo
5:00 am - 12:35 pm
STL
-
MHT
6h 35m
1 stop
Southwest Logo
7:10 pm - 10:45 pm
MHT
-
STL
4h 35m
1 stop
$378Southwest
Fri, Apr 17 - Mon, Apr 20
American Airlines Logo
5:51 am - 11:42 am
STL
-
MHT
4h 51m
1 stop
American Airlines Logo
10:27 am - 4:59 pm
MHT
-
STL
7h 32m
1 stop
$381American Airlines
Fri, May 15 - Thu, May 21
Southwest Logo
5:40 am - 12:35 pm
STL
-
MHT
5h 55m
2 stops
Southwest Logo
7:10 pm - 10:45 pm
MHT
-
STL
4h 35m
1 stop
$383Southwest
Fri, Apr 17 - Mon, Apr 20

United Airlines flights from St. Louis to Manchester, New Hampshire

Our best United Airlines deals on St. Louis to Manchester, New Hampshire flight tickets
United Airlines
May 27
STL6:00 amLambert-St Louis
12h 02m
2 stops
MHT7:02 pmManchester
May 28
MHT2:37 pmManchester
5h 49m
1 stop
STL7:26 pmLambert-St Louis
$402
United Airlines
May 28
STL8:00 amLambert-St Louis
10h 02m
2 stops
MHT7:02 pmManchester
Jun 2
MHT2:37 pmManchester
9h 59m
2 stops
STL11:36 pmLambert-St Louis
$407
United Airlines
Apr 7
STL9:10 amLambert-St Louis
8h 46m
2 stops
MHT6:56 pmManchester
Apr 14
MHT2:30 pmManchester
10h 27m
2 stops
STL11:57 pmLambert-St Louis
$417

Southwest flights from St. Louis to Manchester, New Hampshire

Our best Southwest deals on St. Louis to Manchester, New Hampshire flight tickets
Southwest
May 5
STL1:45 pmLambert-St Louis
6h 20m
1 stop
MHT9:05 pmManchester
May 12
MHT7:30 amManchester
5h 00m
1 stop
STL11:30 amLambert-St Louis
$307
Southwest
May 5
STL3:55 pmLambert-St Louis
4h 10m
1 stop
MHT9:05 pmManchester
May 12
MHT3:45 pmManchester
7h 25m
2 stops
STL10:10 pmLambert-St Louis
$312
Southwest
May 16
STL5:35 pmLambert-St Louis
4h 30m
1 stop
MHT11:05 pmManchester
May 22
MHT7:10 pmManchester
4h 35m
1 stop
STL10:45 pmLambert-St Louis
$357

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Manchester, 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 March 24, 2026.
Use the filters below to find and compare flights from St. Louis to Manchester, New Hampshire that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisManchester

STL - MHT

STLMHT

Lambert-St Louis

Tue 5/5

1:45 pm-9:05 pm

1 stop6h 20m

Manchester

Tue 5/12

7:30 am-11:30 am

1 stop5h 00m

$307

St. LouisManchester

STL - MHT

STLMHT

Lambert-St Louis

Fri 5/15

5:51 am-11:42 am

1 stop4h 51m

Manchester

Mon 5/18

5:41 pm-11:56 pm

1 stop7h 15m

$311

St. LouisManchester

STL - MHT

STLMHT

Lambert-St Louis

Tue 5/5

3:55 pm-9:05 pm

1 stop4h 10m

Manchester

Tue 5/12

3:45 pm-10:10 pm

2 stops7h 25m

$312
Quickest round-trip

St. LouisManchester

STL - MHT

STLMHT

Lambert-St Louis

Sat 5/16

5:35 pm-11:05 pm

1 stop4h 30m

Manchester

Fri 5/22

7:10 pm-10:45 pm

1 stop4h 35m

$357

St. LouisManchester

STL - MHT

STLMHT

Lambert-St Louis

Mon 5/4

4:40 pm-9:55 pm

1 stop4h 15m

Manchester

Mon 5/11

4:40 pm-11:25 pm

1 stop7h 45m

$367

St. LouisManchester

STL - MHT

STLMHT

Lambert-St Louis

Mon 5/4

1:45 pm-9:55 pm

1 stop7h 10m

Manchester

Mon 5/11

3:15 pm-10:55 pm

2 stops8h 40m

$372

St. LouisManchester

STL - MHT

STLMHT

Lambert-St Louis

Wed 5/27

1:45 pm-10:30 pm

2 stops7h 45m

Manchester

Tue 6/2

9:10 am-6:00 pm

2 stops9h 50m

$377

St. LouisManchester

STL - MHT

STLMHT

Lambert-St Louis

Fri 4/17

5:00 am-12:35 pm

1 stop6h 35m

Manchester

Mon 4/20

7:10 pm-10:45 pm

1 stop4h 35m

$378

St. LouisManchester

STL - MHT

STLMHT

Lambert-St Louis

Fri 5/15

5:51 am-11:42 am

1 stop4h 51m

Manchester

Thu 5/21

10:27 am-4:59 pm

1 stop7h 32m

$381

St. LouisManchester

STL - MHT

STLMHT

Lambert-St Louis

Fri 4/17

5:40 am-12:35 pm

2 stops5h 55m

Manchester

Mon 4/20

7:10 pm-10:45 pm

1 stop4h 35m

$383

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 Boston from

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

If you aren’t able to travel during the month of May, then book flights to Manchester, New Hampshire from St. Louis during August instead. Flights to Manchester, New Hampshire in August, while not as cheap as those in May, still average around $276.

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

You could potentially save up to 7% on your flight if you consider stops on a St. Louis to Manchester, New Hampshire flight.

When to book flights from St. Louis to Manchester, New Hampshire

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Manchester, New Hampshire according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Manchester, New Hampshire (STL to MHT) flight deals and tips

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

Fastest flight time

4h 10m

Direct flights

None
The fastest flight from St. Louis to Manchester, New Hampshire takes 4h 10m
There are no direct flights from St. Louis to Manchester, New Hampshire. There are no popular flight routes from St. Louis to Manchester, New Hampshire.
Search flight deals

  • How far is Lambert-St Louis to Manchester by plane?

    The straight-line distance from Lambert-St Louis to Manchester is 1022.3 mi. Flights usually cover this in 4h 10m, depending on flying conditions and air traffic around both airports.

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

    Prices for flights from Lambert-St Louis Airport to Manchester Airport are updated daily.

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

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

    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 Manchester Airport.

  • What documentation or ID do you need to fly to Manchester Airport?

    The travel and health documents you'll need for your trip to Manchester Airport 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 Manchester Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from St. Louis to Manchester, New Hampshire?

Best airlines flying from St. Louis to Manchester, New Hampshire

Compare and see reviews for airlines that fly from St. Louis to Manchester, New Hampshire with momondo
Airline
Rating
Free Cancellation
Price
SouthwestPriceFrom $200Free CancellationRating
8.0
4,331 reviews
Search Southwest flights
American AirlinesPriceFrom $256Free CancellationRating
7.1
11,491 reviews
Search American Airlines flights

Traveling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Keene

Why use momondo?

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

It is quick and easy to find St. Louis to Manchester flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Manchester that suits you.

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

Yes. All flights to Manchester from St. Louis on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Manchester from St. Louis.

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

Price alerts on flights to Manchester from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Manchester, New Hampshire trip

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