Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Portland, Maine from $158

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 Portland, Maine departing on 1/7. 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

Deals available from 900+ travel sites.

"This year, momondo is the #1 place for airfares on the internet."
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.
Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.
Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.
Price Alerts
Price Alerts
Not ready to book? to track prices.

Find the cheapest flights from St. Louis to Portland

Cheap round-trip flights

These are some of the best round-trip flight deals from St. Louis to Portland that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from St. Louis to Portland.

Cheap last minute flights

Planning a quick getaway from St. Louis to Portland? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to Portland, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from St. Louis to Portland

Find recent round-trip train or bus tickets from St. Louis to Portland.

All round-trip flight deals to Portland

The cheapest plane tickets to Portland found on KAYAK recently.
2:15 pm - 10:30 pmSTL-PWM
7h 15m1 stop
2:25 pm - 7:57 pmPWM-STL
6h 32m1 stop
$351American Airlines
Find Deal
Fri, Jan 31 - Sat, Feb 1
10:20 am - 4:43 pmSTL-PWM
5h 23m1 stop
1:10 pm - 11:14 pmPWM-STL
11h 04m2 stops
$356Delta
Find Deal
Fri, Jan 31 - Sat, Feb 1
6:30 am - 2:22 pmSTL-PWM
6h 52m2 stops
1:10 pm - 11:14 pmPWM-STL
11h 04m2 stops
$361Delta
Find Deal
Fri, Jan 31 - Sat, Feb 1
6:40 am - 3:00 pmSTL-PWM
7h 20m1 stop
7:05 am - 12:18 pmPWM-STL
6h 13m1 stop
$386American Airlines
Find Deal
Thu, Apr 17 - Sun, Apr 20
6:40 am - 3:00 pmSTL-PWM
7h 20m1 stop
5:33 pm - 9:00 pmPWM-STL
4h 27m1 stop
$406American Airlines
Find Deal
Sun, May 4 - Sat, May 10
6:10 pm - 12:05 amSTL-PWM
4h 55m1 stop
5:30 am - 2:05 pmPWM-STL
9h 35m1 stop
$516Southwest
Find Deal
Fri, Mar 7 - Sun, Mar 16
4:55 pm - 12:05 amSTL-PWM
6h 10m2 stops
5:30 am - 2:05 pmPWM-STL
9h 35m1 stop
$521Southwest
Find Deal
Fri, Mar 7 - Sun, Mar 16
6:30 am - 2:35 pmSTL-PWM
7h 05m1 stop
5:14 pm - 11:28 pmPWM-STL
7h 14m1 stop
$592United Airlines
Find Deal
Tue, Dec 3 - Sat, Dec 7
5:18 pm - 10:44 amSTL-PWM
16h 26m2 stops
7:22 pm - 11:09 amPWM-STL
16h 47m2 stops
$603United Airlines
Find Deal
Sun, May 4 - Sat, May 10
7:30 am - 7:15 pmSTL-PWM
10h 45m1 stop
9:13 pm - 10:46 pmPWM-STL
26h 33m1 stop
$607Frontier
Find Deal
Sun, Dec 1 - Fri, Dec 6
2:15 pm - 10:30 pmSTL-PWM
7h 15m1 stop
$158American Airlines
Find Deal
Tue, Jan 7
6:00 pm - 11:09 pmSTL-PWM
4h 09m1 stop
$163Delta
Find Deal
Sun, Nov 24
11:25 am - 11:47 pmSTL-PWM
11h 22m2 stops
$168Delta
Find Deal
Sun, Nov 24
5:58 pm - 12:37 amSTL-PWM
5h 39m1 stop
$188American Airlines
Find Deal
Mon, Jan 6
5:17 pm - 12:10 amSTL-PWM
5h 53m1 stop
$193Delta
Find Deal
Sat, Jan 4
7:15 am - 4:43 pmSTL-PWM
8h 28m2 stops
$198Delta
Find Deal
Fri, Jan 10
2:50 pm - 12:05 amSTL-PWM
8h 15m2 stops
$218Southwest
Find Deal
Sun, Jan 5
4:27 pm - 5:34 pmSTL-PWM
24h 07m3 stops
Sun, Jan 5
6:00 am - 1:30 pmSTL-PWM
6h 30m2 stops
$358Southwest
Find Deal
Thu, Dec 26
5:40 pm - 10:26 amSTL-PWM
15h 46m3 stops
$637United Airlines
Find Deal
Sun, Nov 24
3:20 pm - 10:50 pmSTL-PWM
30h 30m3 stops
9:30 am - 3:39 pmPWM-STL
7h 09m1 stop
$626United Airlines
Find Deal
Sat, Nov 23 - Mon, Nov 25
5:34 pm - 11:47 pmSTL-PWM
5h 13m1 stop
4:58 pm - 8:49 pmPWM-STL
4h 51m1 stop
$661Delta
Find Deal
Sat, Nov 23 - Mon, Nov 25
6:30 am - 12:11 pmSTL-PWM
4h 41m1 stop
6:10 am - 2:59 pmPWM-STL
9h 49m2 stops
$666Delta
Find Deal
Sat, Nov 23 - Mon, Nov 25
5:21 pm - 5:34 pmSTL-PWM
23h 13m3 stops
11:54 am - 8:50 amPWM-STL
45h 56m3 stops
Thu, Nov 21 - Sat, Nov 23
5:21 pm - 11:21 amSTL-PWM
17h 00m2 stops
11:54 am - 4:25 pmPWM-STL
29h 31m3 stops
Thu, Nov 21 - Sat, Nov 23
12:37 pm - 8:09 pmSTL-PWM
6h 32m1 stop
4:40 pm - 12:19 pmPWM-STL
20h 39m2 stops
$881United Airlines
Find Deal
Thu, Nov 21 - Sat, Nov 23
8:05 am - 2:35 pmSTL-PWM
5h 30m1 stop
4:30 pm - 10:27 amPWM-STL
18h 57m1 stop
$886United Airlines
Find Deal
Thu, Nov 21 - Sat, Nov 23
10:35 am - 5:35 pmSTL-PWM
6h 00m2 stops
3:20 pm - 12:05 amPWM-STL
9h 45m2 stops
$926Southwest
Find Deal
Thu, Nov 21 - Sat, Nov 23

American Airlines flights from St. Louis to Portland, Maine

Our best American Airlines deals on St. Louis to Portland, Maine flight tickets
American Airlines
Jan 31
STL2:15 pmLambert-St Louis
7h 15m
1 stop
PWM10:30 pmPortland
Feb 1
PWM2:25 pmPortland
6h 32m
1 stop
STL7:57 pmLambert-St Louis
American Airlines
Apr 17
STL6:40 amLambert-St Louis
7h 20m
1 stop
PWM3:00 pmPortland
Apr 20
PWM7:05 amPortland
6h 13m
1 stop
STL12:18 pmLambert-St Louis
American Airlines
May 4
STL6:40 amLambert-St Louis
7h 20m
1 stop
PWM3:00 pmPortland
May 10
PWM5:33 pmPortland
4h 27m
1 stop
STL9:00 pmLambert-St Louis

Delta flights from St. Louis to Portland, Maine

Our best Delta deals on St. Louis to Portland, Maine flight tickets
Delta
Jan 31
STL10:20 amLambert-St Louis
5h 23m
1 stop
PWM4:43 pmPortland
Feb 1
PWM1:10 pmPortland
11h 04m
2 stops
STL11:14 pmLambert-St Louis
Delta
Jan 31
STL6:30 amLambert-St Louis
6h 52m
2 stops
PWM2:22 pmPortland
Feb 1
PWM1:10 pmPortland
11h 04m
2 stops
STL11:14 pmLambert-St Louis
Delta
Dec 4
STL6:30 amLambert-St Louis
4h 41m
1 stop
PWM12:11 pmPortland
Dec 5
PWM6:10 amPortland
6h 47m
1 stop
STL11:57 amLambert-St Louis

How to get the cheapest flight ticket from St. Louis to Portland, Maine

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 from St. Louis to Portland, Maine?

January. The cheapest time of year to fly to Portland, Maine from St. Louis is January. Most expensive is March

What is the cheapest day to depart St. Louis for Portland, Maine?

Tuesday. The cheapest day of the week is typically Tuesday. The most expensive is typically Friday

When is the cheapest time to fly from St. Louis to Portland, Maine?

In the evening. St. Louis to Portland, Maine flights are approximately 35% more expensive at noon than in the evening

What is the cheapest airline that flies to Portland, Maine from St. Louis?

Frontier. Frontier, Southwest, and American Airlines are the most popular carriers operating from St. Louis to Portland, Maine

What is the cheapest St. Louis to Portland, Maine flight route?

Lambert-St Louis - Portland. Fly from Lambert-St Louis to Portland for the best St. Louis - Portland, Maine flight prices

How far in advance should you book St. Louis to Portland, Maine flights?

4 days before. The cheapest time to buy a flight from St. Louis to Portland, Maine is approximately 4 days to departure

Can stopping save me money on St. Louis to Portland, Maine flights?

You could potentially save up to 3% on your flight if you consider stops on a St. Louis to Portland, Maine flight.

When to book flights from St. Louis to Portland, Maine

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

Cheap St. Louis to Portland, Maine (STL to PWM) flight deals and tips

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

Best Price Found

$158

Fastest flight time

4h 09m

Direct flights

None

Airports in Portland, Maine

1 airport
The best one-way flight to Portland, Maine from St. Louis in the past 72 hours is $158. The best round-trip flight deal from St. Louis to Portland, Maine found on momondo in the last 72 hours is $351.
The fastest flight from St. Louis to Portland, Maine takes 4h 09m
There are no direct flights from St. Louis to Portland, Maine. Popular non-direct route for this connection is Lambert-St Louis Airport - Portland Airport.
There is 1 airport near Portland, Maine: Portland (PWM)

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

    Portland is 1090.4 mi away from Lambert-St Louis. In terms of flight time, this usually takes a little over 4h 09m.

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

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

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Portland Airport.

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

    The travel and health documents you'll need for your trip to Portland 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 Portland 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 Portland, Maine?


Best airlines flying from St. Louis to Portland, Maine

Compare and see reviews for airlines that fly from St. Louis to Portland, Maine with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $153Free CancellationRating
6.1
3,543 reviews
Search Frontier flights
American AirlinesPriceFrom $286Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $316Free CancellationRating
8.1
5,022 reviews
Search Southwest flights
DeltaPriceFrom $316Free CancellationRating
8.0
8,766 reviews
Search Delta flights
United AirlinesPriceFrom $377Free CancellationRating
7.4
9,168 reviews
Search United Airlines flights

Why use momondo?

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

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

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

All flight searches from St. Louis to Portland on momondo can be filtered to show those which offer flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Portland.

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

Price alerts on flights to Portland 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 Portland, Maine trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
From?
To?
Sat 11/23
Sat 11/30
Email me momondo's favorite deals

Find better results for your trip to the United States