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Cheap flights from Portland, Maine to St. Louis from $213

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Portland, Maine to St. Louis departing on 1/5. 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 Portland, Maine to St. Louis

Cheap round-trip flights

These are some of the best round-trip flight deals from Portland, Maine to St. Louis 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 Portland, Maine to St. Louis.

Cheap last minute flights

Planning a quick getaway from Portland, Maine to St. Louis? 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 St. Louis, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from Portland, Maine to St. Louis

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

All round-trip flight deals to St. Louis

The cheapest plane tickets to St. Louis found on KAYAK recently.
7:51 pm - 11:40 pmPWM-STL
28h 49m1 stop
5:05 pm - 6:08 pmSTL-PWM
24h 03m1 stop
$213Frontier
Find Deal
Sun, Jan 5 - Sat, Jan 11
9:13 pm - 11:24 pmPWM-STL
27h 11m1 stop
9:15 am - 8:14 pmSTL-PWM
9h 59m1 stop
$278Frontier
Find Deal
Mon, Dec 9 - Mon, Dec 16
2:25 pm - 7:57 pmPWM-STL
6h 32m1 stop
6:00 am - 12:06 pmSTL-PWM
5h 06m1 stop
$316American Airlines
Find Deal
Sat, Jan 18 - Tue, Jan 21
6:10 am - 12:05 pmPWM-STL
6h 55m1 stop
5:17 pm - 12:10 amSTL-PWM
5h 53m1 stop
$321Delta
Find Deal
Wed, Dec 18 - Wed, Dec 25
5:05 am - 12:03 pmPWM-STL
7h 58m2 stops
5:17 pm - 12:10 amSTL-PWM
5h 53m1 stop
$326Delta
Find Deal
Wed, Dec 18 - Wed, Dec 25
5:17 pm - 9:45 pmPWM-STL
5h 28m1 stop
2:15 pm - 10:30 pmSTL-PWM
7h 15m1 stop
$351American Airlines
Find Deal
Sun, Jan 5 - Sat, Jan 11
5:20 am - 9:54 amPWM-STL
5h 34m1 stop
5:30 pm - 10:45 amSTL-PWM
16h 15m3 stops
$517United Airlines
Find Deal
Sun, Jan 5 - Sat, Jan 11
7:30 am - 2:24 pmPWM-STL
7h 54m1 stop
6:25 am - 2:37 pmSTL-PWM
7h 12m1 stop
$563United Airlines
Find Deal
Thu, Dec 26 - Mon, Dec 30
5:30 am - 2:00 pmPWM-STL
9h 30m2 stops
5:10 am - 10:40 amSTL-PWM
4h 30m1 stop
$601Southwest
Find Deal
Thu, Dec 26 - Mon, Dec 30
5:30 am - 2:00 pmPWM-STL
9h 30m2 stops
2:50 pm - 12:05 amSTL-PWM
8h 15m2 stops
$626Southwest
Find Deal
Thu, Dec 26 - Mon, Dec 30
2:45 pm - 11:25 pmPWM-STL
9h 40m1 stop
$229Southwest
Find Deal
Sun, Feb 16
2:45 pm - 11:10 pmPWM-STL
9h 25m2 stops
$258Southwest
Find Deal
Sun, Feb 16
6:14 pm - 4:26 pmPWM-STL
23h 12m3 stops
5:21 pm - 11:21 amSTL-PWM
17h 00m2 stops
Fri, Nov 22 - Sun, Nov 24
6:14 pm - 4:26 pmPWM-STL
23h 12m3 stops
5:21 pm - 5:34 pmSTL-PWM
23h 13m3 stops
Fri, Nov 22 - Sun, Nov 24
6:00 am - 12:04 pmPWM-STL
7h 04m1 stop
9:24 am - 3:51 pmSTL-PWM
5h 27m1 stop
$916Delta
Find Deal
Wed, Nov 20 - Sun, Nov 24
6:10 am - 11:58 amPWM-STL
6h 48m1 stop
6:00 am - 3:51 pmSTL-PWM
8h 51m2 stops
$921Delta
Find Deal
Wed, Nov 20 - Sun, Nov 24
1:15 pm - 9:20 pmPWM-STL
9h 05m2 stops
6:10 am - 2:35 pmSTL-PWM
7h 25m2 stops
$926Southwest
Find Deal
Wed, Nov 20 - Sun, Nov 24

Frontier flights from Portland, Maine to St. Louis

Our best Frontier deals on Portland, Maine to St. Louis flight tickets
Frontier
Jan 5
PWM7:51 pmPortland
28h 49m
1 stop
STL11:40 pmLambert-St Louis
Jan 11
STL5:05 pmLambert-St Louis
24h 03m
1 stop
PWM6:08 pmPortland
Frontier
Dec 9
PWM9:13 pmPortland
27h 11m
1 stop
STL11:24 pmLambert-St Louis
Dec 16
STL9:15 amLambert-St Louis
9h 59m
1 stop
PWM8:14 pmPortland

Delta flights from Portland, Maine to St. Louis

Our best Delta deals on Portland, Maine to St. Louis flight tickets
Delta
Dec 18
PWM6:10 amPortland
6h 55m
1 stop
STL12:05 pmLambert-St Louis
Dec 25
STL5:17 pmLambert-St Louis
5h 53m
1 stop
PWM12:10 amPortland
Delta
Dec 18
PWM5:05 amPortland
7h 58m
2 stops
STL12:03 pmLambert-St Louis
Dec 25
STL5:17 pmLambert-St Louis
5h 53m
1 stop
PWM12:10 amPortland
Delta
Dec 18
PWM6:05 amPortland
12h 06m
2 stops
STL5:11 pmLambert-St Louis
Dec 25
STL11:46 amLambert-St Louis
11h 24m
2 stops
PWM12:10 amPortland

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

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

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

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

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

In the afternoon. Portland, Maine to St. Louis flights are approximately 30% more expensive at noon than in the afternoon

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

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

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

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

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

59 days before. The cheapest time to buy a flight from Portland, Maine to St. Louis is approximately 59 days to departure

How have Portland, Maine to St. Louis flight prices changed over time?

As of November 2024, prices for Portland, Maine to St. Louis flights are approximately 17% cheaper when compared to flights at the same time last year.

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

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

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

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

Best Price Found

$229

Fastest flight time

5h 28m

Direct flights

None

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Portland, Maine in the past 72 hours is $229. The best round-trip flight deal from Portland, Maine to St. Louis found on momondo in the last 72 hours is $213.
The fastest flight from Portland, Maine to St. Louis takes 5h 28m
There are no direct flights from Portland, Maine to St. Louis. Popular non-direct route for this connection is Portland Airport - Lambert-St Louis Airport.
There is 1 airport near St. Louis: Lambert-St Louis (STL)

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

    The distance between Portland and Lambert-St Louis is about 1090.4 mi. 5h 28m is a normal flight duration for this route.

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

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

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

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

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

    The travel and health documents you'll need for your trip to Lambert-St Louis 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 Lambert-St Louis 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 Portland, Maine to St. Louis?


Best airlines flying from Portland, Maine to St. Louis

Compare and see reviews for airlines that fly from Portland, Maine to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $314Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $338Free CancellationRating
8.0
8,765 reviews
Search Delta flights
United AirlinesPriceFrom $341Free CancellationRating
7.4
9,173 reviews
Search United Airlines flights

Why use momondo?

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

Finding the right flight to St. Louis from Portland is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to St. Louis quick and easy, saving you time and money.

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

Flights from Portland to St. Louis with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo helps you find the best flight between Portland 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 Portland to St. Louis right now. Can momondo alert me if prices change?

If you are simply researching potential flights to St. Louis, momondo offers a useful price alert feature which will track prices for flights to St. Louis from Portland and alert you when they change.


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