$59 Find Cheap Flights from St. Louis to Massachusetts

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 Massachusetts departing on 9/18. 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

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

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

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Boston
Boston1 stop$134
Albany
Albany1 stop$237
Boston
Boston1 stop$134
Albany
Albany1 stop$237

Book Cheap St. Louis to Massachusetts 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 Massachusetts 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 Massachusetts

Thu, Sep 18 - Sun, Sep 21
Spirit Airlines Logo
12:05 pm - 10:43 pmSTL-BOS
9h 38m1 stop
Spirit Airlines Logo
6:20 am - 10:50 amBOS-STL
5h 30m1 stop
$134Spirit Airlines
Find Deal
Fri, Aug 22 - Mon, Aug 25
Spirit Airlines Logo
2:30 pm - 10:34 pmSTL-BOS
7h 04m1 stop
Spirit Airlines Logo
6:30 am - 1:32 pmBOS-STL
8h 02m1 stop
$147Spirit Airlines
Find Deal
Sat, Sep 13 - Sat, Sep 20
American Airlines Logo
6:10 am - 5:04 pmSTL-BOS
9h 54m1 stop
American Airlines Logo
11:28 am - 8:32 pmBOS-STL
10h 04m1 stop
$217American Airlines
Find Deal
Wed, Aug 27 - Wed, Sep 3
American Airlines Logo
6:02 am - 11:39 amSTL-BDL
4h 37m1 stop
American Airlines Logo
6:22 am - 11:35 amBDL-STL
6h 13m1 stop
$229American Airlines
Find Deal
Wed, Aug 27 - Wed, Sep 3
Southwest Logo
6:25 am - 3:10 pmSTL-BDL
7h 45m2 stops
Southwest Logo
5:20 pm - 9:40 pmBDL-STL
5h 20m1 stop
$234Southwest
Find Deal
Wed, Oct 8 - Wed, Oct 15
Delta Logo
1:35 pm - 9:27 pmSTL-BOS
6h 52m1 stop
Delta Logo
10:10 am - 3:55 pmBOS-STL
6h 45m1 stop
$237Delta
Find Deal
Mon, Sep 29 - Sat, Nov 1
Delta Logo
3:36 pm - 11:14 pmSTL-BDL
6h 38m1 stop
Delta Logo
10:00 am - 2:43 pmBDL-STL
5h 43m1 stop
$237Delta
Find Deal
Fri, Sep 5 - Tue, Sep 9
United Airlines Logo
6:35 am - 2:01 pmSTL-BDL
6h 26m2 stops
United Airlines Logo
2:57 pm - 6:59 pmBDL-STL
5h 02m1 stop
$238United Airlines
Find Deal
Wed, Aug 27 - Wed, Sep 3
Southwest Logo
11:10 am - 8:00 pmSTL-BDL
7h 50m2 stops
Southwest Logo
2:15 pm - 8:05 pmBDL-STL
6h 50m2 stops
$239Southwest
Find Deal
Fri, Sep 5 - Sat, Sep 6
United Airlines Logo
6:35 am - 2:01 pmSTL-BDL
6h 26m2 stops
United Airlines Logo
6:00 am - 12:25 pmBDL-STL
7h 25m2 stops
$243United Airlines
Find Deal
Booking Insights

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

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

How much is a round-trip flight from St. Louis to Massachusetts?

What is the cheapest St. Louis to Massachusetts flight route?

The cheapest price for flight routes found by users searching on KAYAK in the last 2 weeks for round-trip flights from St. Louis to Massachusetts.

The cheapest ticket to Massachusetts from St. Louis found in the last 72 hours was to Boston, at $208 round-trip. The most popular route is from St. Louis (STL) to Boston (BOS), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $208.

Can I save money by flying with a layover from St. Louis to Massachusetts?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $543 on average.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Massachusetts, 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 Massachusetts is September, when tickets cost $376 (return) on average. On the other hand, the most expensive months are June and May, when the average cost of round-trip tickets is $442 and $441 respectively.

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

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

If you are looking for a flight deal from St. Louis to Massachusetts, look for departures on Thursdays and avoid leaving on a Saturday, as it's usually the priciest day. When flying back from Massachusetts, Wednesday is the cheapest day to fly and Sunday is the most expensive.

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

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 Massachusetts, 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 Massachusetts, you should book around 4 weeks before departure, which saves you about 46% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 11 weeks before departure.


Good to know

Low seasonJanuary
Cheapest flight$59
Best time to beat the crowds with an average 0% drop in price.
Most popular time to fly and prices are also 0% lower on average.
Flight from St. Louis to Boston

FAQs - booking Massachusetts flights

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

    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 Massachusetts.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from St. Louis to Massachusetts 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 Massachusetts?

    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 Massachusetts 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 Massachusetts?

    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 Massachusetts 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 Massachusetts?

    The cheapest time of day to fly to Massachusetts is generally in the evening, when round-trip flights cost $421 on average. Morning departures are around 18% more expensive than evening flights, on average. The most expensive time of day to fly to Massachusetts is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $1,070.

Reviews of the top 5 airlines serving from St. Louis to Massachusetts

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Massachusetts. 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 Massachusetts? 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 4241 reviews
7.0Food
7.5Entertainment
8.0Comfort
8.1Boarding
8.6Crew
Airline reviews

southwest just starting charging for luggage. hadnt realized it until it was too late. now out $70 when i couldve bought a carry on if i wouldve known. free bags was one of the only reasons i chose southwest over another airline (the other being no assigned seats, which is apparently also being changed). stupid business decision. wont be flying southwest anymore.

2.0 MediocreAnonymous, Jul 2025AUS - RDU
Read more Southwest reviews

southwest just starting charging for luggage. hadnt realized it until it was too late. now out $70 when i couldve bought a carry on if i wouldve known. free bags was one of the only reasons i chose southwest over another airline (the other being no assigned seats, which is apparently also being changed). stupid business decision. wont be flying southwest anymore.

The quality of Southwest Airlines continues to degrade each time I fly with them. If it were not for the free luggage, I would probably choose another airline. Their prices are a little bit competitive, but way too high for the quality of the service. Southwest is not unique in this way. Domestic flight in the United States of America has continued to be a lower and lower quality product. Very sad when you compare the quality of domestic airlines to that of many international airlines around the world.

Very smooth checking in our luggage with a super pleasant SW agent. I enjoyed a fun entertaining movie.

WiFi did not work. For as outrageous as these flights cost, when they’re advertised with certain services/ features they should be in working order

Worst experience I had on Southwest. Still better than most, but the seating was barely tolerable.

The Southwest employees (all two of them) were very nice and cheerful despite the fact the line to self-check a bag (simply drop it off) was hundreds of people long. Thank God I arrived early to the airport because I stood in this line for at least an hour. Once on the flight that had been delayed by an hour, we had no Wi-Fi and thus no entertainment. Finally, I hope the investor strong arm tactics against Southwest pay off in a short-term windfall to your C-Suite because the rest of you are screwed. I have been a faithful Southwest customer for 15 years due to everything you just got rid of. I'm flying to Idaho and Washington in October, both places I used to simply book with Southwest without a second thought now with Frontier (Washington) and United (Idaho) because they offer everything the "new" Southwest does but cheaper and at better times, destinations, etc. This really makes me sad...

It was okay. The plane was delayed from earlier in the day, but they kept updating the departure time, sometimes later, sometimes earlier. That was stressful. Once we finally got on and took off, it was fine. I was supposed to have a connection in Chicago to Los Angeles, and the time for so late I was rebooked to arrive in LA 3 hours late. The departure time to Chicago later became early enough to have taken my original connection and arrive earlier but that wasn't an option.

It was one and half hour late... Not sure if any other experience matters.

Delayed flight. Nicest crew member was a SW pilot flying seated next to me who kindly move to seat the final passenger. Flight extra delayed. My cup of refreshment of ginger ale was so packed with ice it was literally 2 sips.

For my birthday trip this was my second time ever flying, this trip was the best.

Delayed and took off even later than the scheduled delay time

For a 69 year old with health problems I had the worse experience, no wheelchair when I entered a lady told me to sit and wait while a gentleman told me I had to walk to the Delta station, which I did. I had a carry on and a bag, and I was traveling with my service dog, which was on his carrier and the lady charged me for my carry on luggage, beside all the waiting cause of the delay, I had to walk to get my luggage cause no wheelchair showed up, I am so disappointed. I will get in touch with the company. I got home at 3:00 am, not good for my health situation.

Great experience on Delta. Staff from baggage check to flight attendants were very courteous and professional. My only issue was a personal preference for pretzels instead of the chips and cookies that were offered.

There was no problems, just a little uncomfortable with seats that do not lay back a little

Always good but we must do something about people in rows ahead of you that don't put their seats back up when they are suppose to. And It's rough to not be able to even lean over to get something out of my purse.

Flight was delayed, 30+ bags had to be gate checked. Crew were very friendly!

Everything was good until we were boarding our connection flight in Atlanta, we were told to gate check our carry-on, but when we got inside the plane, there was plenty of room in the overhead.

Did not know my son and I had different seating arrangements. He was fine, but it was disappointing.

Flight was canceled, and no effort was made to help with rebooking, no hotel vouchers, no car transportation and minimal food voucher and most places for food were closed by the time the voucher was given. Waited for 3 hours for bags. Simply the worst travel experience I have ever had

Food was surprisingly good but the WiFi was not great

Very poor delay in dfw was really bad n long

Our flight was 1.5 hours delayed. There was no weather for the inbound flight, so I don't understand why. This meant a VERY late arrival and only a quick nap before my morning flight.

Because of rescheduling, they had to put me on a flight that didn't go through Dallas

It was very difficult to stretch my knee out and I am very short. I also had a torn tendon in my knee which made it extra uncomfortable anyways. My husband is 6'2" and I can't imagine him flying in that plane.

3 hour weather delay followed by 1 hour (and counting) maintenance delay. UGH!

Couldn’t get the door on the plane to close leading to a nearly 2 hour delay. But, hey at least they didn’t cancel the flight.

Flight was cancelled 3 hrs AFTER etd. Thetefore Missed connection from JFK to New Zealand . No accommodation provided… This cost ne aporox 1000 USD in extra expenses and turned whst should have been a 24 hr trip ftom Boston - New Zealand into a VERY expensive , late 70+ hr nightmare … Complete nonsense!!!

After we'd boarded , they canceled the flight. The crew didn't even know , we just all received text messages. Then after they deplaned us , AA was just like "too bad, go F your self, we sure ain't gonna help you"

The flight got delayed 2.5 hrs due to a maintenance issue that cause a domino effect. American should have spare planes for when something like this happens.

Delayed flight, so I switched fights to SFO to Phoenix , Phoenix to DSM. Excellent service through American Airlines

The flight was 3.5 hrs delayed. I was not notified prior to arriving to the airport via spirit app. or via boarding pass that I already had loaded on my phone. The agent that i saw at the counter didn’t mention anything about the delay either. I only saw the update after logging in to my email account.

The flight and boarding process was smooth. Wifi was unavailable and I prepaid for it. Have requested a refund

Had a issue with catching flight due to airline, was unable to board flight

Spirit is a very uncomfortable travel experience. It’s cheap but you are squeezed into the seats like canned meat.

Not great. Seats uncomfortable. Crew a little rude. Amenities like wifi and drinks way too expensive.

Late departure by 1:45min. No explanation why. During boarding inconsistent policing of their baggage rules. Before takeoff and lamdimg strange obsession with window shade and armrest positions. Don't know why they care. 15 min tarmac delay on arrival, they blamed airport congestion but we were the o lh flight waiting, it was clear it was due to poor staff planning (only one ground crew to receive airplanes and multiple arrivals) Got there but was rrally lame the whole trip.

The seat belt was lengthy enough that I did not need an extender. Courteous and helpful flight attendants.

We sat on the tarmac for an hour waiting for a gate to deplane.

Friendly employees, good seat, on time, Great flight. Pilot and attendants greeted passengers as we deplaned. However, I could not ever understand what the flight attendant was saying on the mic. It was too fast, and too loud.

Everything was fine, but there was no food or entertainment, so I didn’t know how to rate that.

Boarding in Orlando was not good. Giant mob at the gate, should have been lines.

Decent clean onboard experience. Okay discount airline experience. Unfortunately, any customer service interactions are difficult and unhelpful. There is no service. Also, a premium seat only gets you premium boarding if you line up first. Once they start general boarding you must go to the back of the line. Not very premium

baggage clamed had to wait over a hour and half for all people on my flight it was terrible

The ticketing agents were rude but then we had a great gate agent very nice we had to ride a buss out to where the plane was parked but it was in some back corner of the airport when we got to the plane the captain who was great btw was cleaning the plane because the same rude ticketing agent told them they we not contracted to vacuum the plane. The ride to las Vegas was fine We had a connecting flight to Dallas. The flight was fine but when we arrived in Dallas everyone who flew on any frontier airlines the picked up bags from baggage claim D15 had to wait over a hour for their bags to start we arrived at 11:30pm ish to the gate we didn't leave the baggage clamed till 12:50 am very not happy and i used to fly frontier 4 times a week for work in Denver i will not be using them again

I was 2 hr arrive in the airport and 45 min in the line . After take to my turn . The agent tell me I’m later . I can not board . So my vacation was going to the floor . Just for their bad customer service agent in the airline

Frontier Airlines was AWFUL. I was an hour early for my flight and the lady refused to check me in. I had to purchase a whole new ticket with a different airline.

My flight was canceled I was promised a reginf still not received.

Late, terrible communication, horrible planning of passenger seating until the literal last minute. One of the worst flying experiences of my life. Y'all suck

Both legs of the flight were changed. The day of the flight and length of the trip.

First of all, we never got on the connecting flight to Denver. They delayed our flight for two hours. If we would have gotten on that flight, we would have been stuck in Denver for 13 hours. So we re- routed our flight for a straight through flight to Oklahoma two days later. THEN, they delayed that flight for two hours. After that we were able to finally get on our flight and come home. Frontier Airlines - one of the worst airlines I have ever been on.

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