Cheap flights from St. Louis to Portland (STL - PWM) from $102
This is the cheapest one-way flight price, found on 9/20. Prices may vary by date and flight preferences.
The best prices from Lambert-St Louis to Portland are usually found in February or April, booked 39 days in advance, depart on a Tuesday or Friday and return on a Tuesday
How to find the cheapest flight from St. Louis (STL) to Portland (PWM)
All the information you need to plan the best STL to PWM flight in 2023: compare St. Louis to Portland flight prices with the expected peak season, weather and rainfall in Portland.
Popular in | July |
|---|---|
Cheapest in | February |
Average price | $429 |
Round-trip from | $313 |
STL - PWM Price | $313 - $537 |
|---|---|
PWM Temperature | 23 - 68 °F |
PWM Rainfall | 2.9 - 4.5 inches |
What is the cheapest day to fly round-trip from St. Louis to Portland, Maine?
Users have found that flying from St. Louis to Portland, Maine on a Sunday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.
How far in advance should I book a flight from St. Louis to Portland, Maine?
Users have found that booking a flight from St. Louis to Portland, Maine at least 39 days early can save you up to 32% on average compared to booking a flight this week. If booking 39 days before your flight isn’t an option for you, users have found flights from St. Louis to Portland, Maine for as little as $598 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $629 for flights departing within the next 3 days.
What is the cheapest month to fly from St. Louis to Portland, Maine?
Due to multiple factors, expect to potentially pay more when booking in July. For low rates, February can be a great choice for travel to Portland, Maine. Flights to Portland, Maine from St. Louis in February are about $463 on average during February, but can be found for as low as $213.
When is the cheapest time to fly from St. Louis to Portland, Maine (STL - PWM)?
When flying from St. Louis to Portland, Maine, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 16% versus a flight in the afternoon.
Cheap Frontier flights from St. Louis to Portland
Find some of the cheapest Frontier flights traveling from St. Louis to Portland. Make sure to double check the flight details before booking.
Cheap American Airlines flights from St. Louis to Portland
To aid your search, here are some of the cheapest American Airlines flights we've found from St. Louis to Portland. Deals frequently update to provide users with more options.
Cheap St. Louis to Portland flights in September & October 2023
The best prices found for STL to PWM flights for September, October
Check out some of the best flight deals from St. Louis to Portland in 2023. Check back regularly for other flight deals.
St. Louis to Portland 2023 flight deals
Cheap flights to Portland from St. Louis found for this year
Check out some of the best flight deals from St. Louis to Portland in 2023. Check back regularly for other flight deals.
St. Louis to Portland flights leaving soon
Late deals on return flights to Portland from St. Louis, departing today and this week
Book one of these great deals on flights from St. Louis to Portland. It's wise to confirm all flight details are correct before booking.
One-way flights to Portland from St. Louis
The cheapest one-way flights from St. Louis to Portland
Some of the best available deals we've found on one-way flights from St. Louis to Portland. Users can also find round-trip St. Louis to Portland flights by using the search form above.
Find flights from St. Louis to Portland within your budget
Use the slider to find flights from St. Louis to Portland that fit your budget.
Fly from
Fly to
Budget
$189 - $460
Route
Depart
Return
Price
Lambert-St LouisPortland
STL - PWM
STLPWM
Lambert-St Louis
Mon 10/23
2 stops16h 36m
Portland
Sat 10/28
1 stop11h 29m
Lambert-St LouisPortland
STL - PWM
STLPWM
Lambert-St Louis
Thu 10/19
1 stop12h 06m
Portland
Wed 10/25
1 stop13h 39m
Lambert-St LouisPortland
STL - PWM
STLPWM
Lambert-St Louis
Thu 10/19
1 stop12h 06m
Portland
Sat 10/28
1 stop11h 29m
Lambert-St LouisPortland
STL - PWM
STLPWM
Lambert-St Louis
Fri 10/20
1 stop15h 34m
Portland
Sat 10/28
1 stop27h 58m
Lambert-St LouisPortland
STL - PWM
STLPWM
Lambert-St Louis
Fri 10/20
1 stop15h 34m
Portland
Fri 10/27
1 stop27h 59m
Lambert-St LouisPortland
STL - PWM
STLPWM
Lambert-St Louis
Thu 10/19
1 stop13h 59m
Portland
Thu 10/26
1 stop29h 18m
Lambert-St LouisPortland
STL - PWM
STLPWM
Lambert-St Louis
Tue 10/24
1 stop5h 03m
Portland
Tue 10/31
1 stop7h 00m
Lambert-St LouisPortland
STL - PWM
STLPWM
Lambert-St Louis
Tue 10/17
1 stop15h 28m
Portland
Tue 10/24
1 stop5h 59m
Lambert-St LouisPortland
STL - PWM
STLPWM
Lambert-St Louis
Tue 10/24
1 stop6h 22m
Portland
Tue 10/31
2 stops10h 40m
Reviews of airlines servicing Portland
Read reviews from past customers who have flown Frontier, American Airlines and Delta from St. Louis to Portland. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
Entertainment
Overall
Boarding
Comfort
Food
Reviews
The flight was comfortable and the crew were attentive. The snacks and drinks were great. The boarding process was smooth. The pilot greeted us upon exit. Our luggage arrived promptly.
Crew
Entertainment
Overall
Boarding
Comfort
Food
Reviews
The flight was comfortable and the crew were attentive. The snacks and drinks were great. The boarding process was smooth. The pilot greeted us upon exit. Our luggage arrived promptly.
Crew
Entertainment
Overall
Boarding
Comfort
Food
Reviews
The flight was comfortable and the crew were attentive. The snacks and drinks were great. The boarding process was smooth. The pilot greeted us upon exit. Our luggage arrived promptly.
Crew
Entertainment
Overall
Boarding
Comfort
Food
Reviews
The flight was comfortable and the crew were attentive. The snacks and drinks were great. The boarding process was smooth. The pilot greeted us upon exit. Our luggage arrived promptly.
Crew
Entertainment
Overall
Boarding
Comfort
Food
Reviews
The flight was comfortable and the crew were attentive. The snacks and drinks were great. The boarding process was smooth. The pilot greeted us upon exit. Our luggage arrived promptly.
Related info for your journey
Useful info, stats and facts about St. Louis to Portland flights.
Can I find flights from St. Louis to Portland, Maine for under $200 on Cheapflights?
Yes, there are multiple flights from St. Louis to Portland, Maine for under $200. The cheapest flight booked recently is on Multiple Airlines for just $189, but on average you can expect to pay $270.
Are there last-minute flights available from St. Louis to Portland, Maine for under $300?
There are currently 12+ open flights from St. Louis to Portland, Maine within the next 7 days for less than $300.
What are the cheapest airlines flying from St. Louis to Portland, Maine round-trip?
According to our current data, Frontier ($245), American Airlines ($344), and Delta ($361) offers the cheapest pricing from St. Louis to Portland, Maine. These flights start at 47% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from St. Louis to Portland, Maine one-way?
$105 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Delta and United Airlines, with prices starting from $194 and $277, respectively.
What are the most popular airlines that fly from St. Louis to Portland, Maine?
Before booking your flight from St. Louis to Portland, Maine check out the most popular airlines for this route: American Airlines, JetBlue or Delta.
What does STL to PWM mean?
Lambert-St Louis Airport is STL and Portland Airport is PWM. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service.