$44 Find Cheap Flights from St. Louis to Maine

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Maine departing on 12/23. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Maine

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Maine, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Maine, as well as popular online travel agencies
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Cheap Flights from St. Louis to Maine

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Portland
Portland1 stop$299
Bangor
Bangor1 stop$404
Boston
Boston1 stop$314
Portland
Portland1 stop$299
Bangor
Bangor1 stop$404
Boston
Boston1 stop$314

Book Cheap St. Louis to Maine Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Maine that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Maine

Wed, Dec 17 - Wed, Dec 31
United Airlines Logo
8:30 am - 2:19 pmSTL-PWM
4h 49m1 stop
United Airlines Logo
7:01 pm - 11:57 pmPWM-STL
5h 56m1 stop
$299United Airlines
Find Deal
Wed, Dec 17 - Wed, Dec 31
United Airlines Logo
1:00 pm - 11:09 pmSTL-PWM
9h 09m2 stops
United Airlines Logo
7:01 pm - 11:57 pmPWM-STL
5h 56m1 stop
$304United Airlines
Find Deal
Sat, Dec 13 - Tue, Dec 16
American Airlines Logo
1:59 pm - 12:13 amSTL-BOS
9h 14m1 stop
American Airlines Logo
8:50 am - 11:14 amBOS-STL
3h 24mnonstop
$314American Airlines
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Thu, Jan 1 - Mon, Jan 5
Multiple Airlines Logo
10:42 am - 1:19 amSTL-BOS
13h 37m1 stop
Multiple Airlines Logo
11:55 am - 10:56 amBOS-STL
24h 01m1 stop
$316Multiple Airlines
Find Deal
Tue, Jan 20 - Sat, Jan 24
American Airlines Logo
2:54 pm - 6:31 pmSTL-BOS
2h 37mnonstop
American Airlines Logo
9:51 am - 6:13 pmBOS-STL
9h 22m1 stop
$323American Airlines
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Fri, Dec 19 - Sun, Dec 21
Multiple Airlines Logo
8:37 pm - 10:21 amSTL-BOS
12h 44m1 stop
Multiple Airlines Logo
12:29 pm - 10:33 pmBOS-STL
11h 04m1 stop
$329Multiple Airlines
Find Deal
Fri, Nov 28 - Tue, Dec 2
Delta Logo
6:40 am - 2:07 pmSTL-PWM
6h 27m1 stop
Delta Logo
6:08 am - 1:16 pmPWM-STL
8h 08m1 stop
$487Delta
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Thu, Nov 27 - Sun, Nov 30
Southwest Logo
10:55 am - 4:50 pmSTL-PWM
4h 55m1 stop
Southwest Logo
5:30 am - 11:45 amPWM-STL
7h 15m1 stop
$551Southwest
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Thu, Nov 27 - Mon, Dec 1
Delta Logo
7:35 am - 1:31 pmSTL-BGR
4h 56m1 stop
Delta Logo
11:48 am - 11:44 pmBGR-STL
12h 56m2 stops
$600Delta
Find Deal
Thu, Nov 27 - Sun, Nov 30
Southwest Logo
7:50 am - 4:50 pmSTL-PWM
8h 00m2 stops
Southwest Logo
5:25 pm - 12:05 amPWM-STL
7h 40m2 stops
$633Southwest
Find Deal
Booking Insights

KAYAK's insights & trends for St. Louis to Maine flights

Get data-powered insights and trends into flights from St. Louis to Maine to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from St. Louis to Maine?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Maine, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to Maine is November, when tickets cost $381 (return) on average. On the other hand, the most expensive months are August and March, when the average cost of round-trip tickets is $481 and $466 respectively.

What’s the cheapest day of the week to fly from St. Louis to Maine?

The average price of all round-trip flights from St. Louis to Maine clicked on KAYAK for each day over the last 12 months.

For St. Louis to Maine, Tuesday is the cheapest day to fly on average and Friday is the most expensive. Flying from Maine back to St. Louis, the best deals are generally found on Tuesday, with Monday being the most expensive.

How far in advance should I book a flight from St. Louis to Maine?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from St. Louis to Maine, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from St. Louis to Maine, you should book around 4 weeks before departure, which saves you about 51% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$44
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly with an average 2% increase in price.
Flight from St. Louis to Boston

FAQs - booking Maine flights

  • How does KAYAK find such low prices on flights from St. Louis to Maine?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Maine.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Maine?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from St. Louis to Maine is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Maine?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from St. Louis to Maine with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Maine?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from St. Louis to Maine up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Maine?

    The cheapest time of day to fly to Maine is generally at night, when round-trip flights cost $285 on average. On average, there is no price difference when choosing to fly in the morning or the evening on this flight route. The most expensive time of day to fly to Maine is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $436.

Top tips for finding cheap flights to Maine

  • Looking for a cheap flight? 25% of our users found tickets from St. Louis to the following destinations at these prices or less: Boston $289 one-way - $462 round-trip

Reviews of the top 4 airlines serving from St. Louis to Maine

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Maine. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Maine? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4235 reviews
8.6Crew
7.5Entertainment
8.1Boarding
8.0Comfort
7.0Food
Airline reviews

Crew could have been friendlier, maybe I'm spoiled by SW crews. In flight wifi was good. Would be nice to have more food offerings on a 4 plus hour flight

10.0 ExcellentMichael, Nov 2025LAX - BWI
Read more Southwest reviews

Crew could have been friendlier, maybe I'm spoiled by SW crews. In flight wifi was good. Would be nice to have more food offerings on a 4 plus hour flight

Had to get off plane from prior flight even though I had to reboard same plane to continue to my final destination.

Everything a cheap airline should be at normal airline rates.

Plane crashed into a bus or some other vehicle on the ground while pulling out of the gate. No injuries, but wing tip was damaged and returned to gate for “maintenance issues” and we departed 5 hours later because the plane went out of service and new plane was flown in from a nearby airport, Midway.

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

Full cans of soda would be nice. A choice between two snacks would be appreciated.

Tried watching free movie and it kept freezing so I couldn’t finish.

All was good. I just had a hard time getting connected to the WiFi/internet during the flight

Sacrament staff are always polite and helpful. Airport is easy to maneuver and boarding is straightforward.

Great flight. Outstanding Service. Southwest was able to put us on a direct flight to Denver when the connection could have been affected by a later arrival to Baltimore. The direct flight was less expensive that the flight with the connection in Baltimore.

The ticket agents in West Palm Beach on Friday afternoon Nov. 7th were incredible in getting us on an earlier plane to Atlanta during the government shutdown. Had the taken our original flight we would have missed our connection. She did this on her own, We didn't even have to ask, and she did it all with a smile and showing genuine concern that we would be taken care of. We are very grateful and thankful. We fly often, and now we will be sure to fly Delta.

Flight delayed then cancelled. Misplaced luggage. Still do not have. Rented car 1100 mile drive. I had to buy some overnight Hotels clothes toiletries gas food at my expense. Still not home. Not sure where luggage is. Over 4 hours on hold to Felta

I truly love flying with Delta. They have always treated me with the upmost respect

Our flight attendant in FIRST CLASS was one of the worst I’ve ever had. She was not at all pleasant, nor particularly good at her service.

Everything went well and was good. Nothing exceptional, but no complaints either. Cheap seats are pretty comfortable.

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They ended up paying for the bag twice, but the counter wouldn't take my baggage receipt. Left it to me to resolve. Not sure how to resolve the issue.

The customer service before board was very rude and when I expressed my concerns about making the connecting flight she laughed and told me I bought the wrong ticket. I explained once it showed the flight was delayed it no longer let me change seats or anything. I was trying to upgrade to make sure I would get to the next gate on time.

Non stop on long haul is the way to go. Great experience

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

Older aircraft, no meal, only food was for purchase. Not impressed United.

United needs to step up their game. Delayed flight leaving Seattle, San Francisco. Older aircraft, not very comfortable.

Always wish for more healthy, gluten free options. We have to bring our own.

Having a long layover, I was very appreciative of the ability to stand by for an earlier flight. Other airlines like Delta have refused this to me in the past, just to be mean (because my ticket class wasn't high enough). United went out of their way to help me get to my destination early, which I really appreciated given that it was the third leg of a 24+ hour journey for me.

Other than a way way too cold cabinets for the entire flight, all was great

One bag is incorrect and not acceptable for an international flight. The food was not just good. I won't fly with them again.

Not pleasant trip cross country when the entertainment and WiFi system not working. No entertainment for entirety of route. Staff was rather nonchalant in that they dismissed the problem due to age of plane. It would have been nice to know this up front so I could have come prepared to read or download movies before boarding Coincidentally or not, there was a similar issue with the entertainment system on my previous flight I took on my fist leg of the trip. There are no seat TVs, so you must rely on the app when it works. United can do better. Also, what use it it to pay for boarding group 2 when half of the passengers are in the same line as you?

Plane boarded early a quickly, was mostly full. We left close to on time. And landed early.

Premium Plus is a really good idea for longer flights

7 hours delayed due to operational issues on United’s end. Basically laziness.

we landed at cmh ten minutes early but had to sit on tarmac for twenty minutes because a plane was at our gate despite the fact that 3 other gates were open.

The experience with American Airlines was good, although the Philippines Airlines flight was much better (better seats, better food, better entertainment options, overall better). Again, the MIA to LAX flight was fine, but nothing in comparison to the comfort and accommodations of the Philippines Airlines flight from LAX to MNL.

I have a gluten allergy so did have any food

I have a gluten allergy so didn't have any food

Loved the crew . Absolutely no complaints. Except for luggage lost

Everything was good The connects, with no blame to crew. Or pilots. I understand they are short staffed. Everything went well for me. I'll be using you guys again in May if not sooner.

this plane was really old, had exit row seats and tray was in arm of seat so super uncomfortable to use. another seat they could t even use the tray it was broke. seat i. front of me had duct tape on it cause seat was ripped open... this plane should either be updated or retired.

Baggage handling poor. Second time this has happened. My bag went to San Francisco instead of Fiji. No apology. Luckily Nadi airport staff are fantastic. My bag arrived in Fiji the next day.

We loved the steward on the plane. He made the night enjoyable

I enjoyed the extra leg room compared to other airlines. The first stewards made my daughter’s birthday special by giving her an extra snack. Then the last one coming home from Chicago to Appleton made our night really enjoyable Thanks for making our trip enjoyable

Everything you need to know for your flight from St. Louis to Maine

Information on your arrival and departure airports