$153+ Cheap flights from Boston to Kalispell (BOS - FCA)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — FCA
May 16 — May 231
Round-trip
1 adult, Economy
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Find cheap flights from Boston to Kalispell with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Boston to Kalispell
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Best
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Cheapest flights from Boston to KalispellExplore the most affordable flight options available from Boston to Kalispell. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 16, 2026.
Explore the most affordable flight options available from Boston to Kalispell. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 16, 2026.
This American Airlines deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/237:00 am
BOS
- FCA
1 stop10h 00m
American Airlines
Sat 5/3012:25 pm
FCA
- BOS
1 stop9h 39m
American Airlines
Deal found 4/14![American Airlines logo]()
$357
This American Airlines deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/276:00 am
BOS
- FCA
2 stops12h 03m
American Airlines
Tue 6/212:25 pm
FCA
- BOS
2 stops10h 15m
American Airlines
Deal found 4/12![American Airlines logo]()
$368
This Delta deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/35:40 am
BOS
- FCA
1 stop10h 05m
Delta
Fri 10/91:29 pm
FCA
- BOS
1 stop8h 24m
Delta
Deal found 4/14![Delta logo]()
$373
This Delta deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/24:50 pm
BOS
- FCA
1 stop8h 37m
Delta
Sat 5/95:13 am
FCA
- BOS
2 stops12h 02m
Delta
Deal found 4/14![Delta logo]()
$378
This Delta deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/278:05 am
BOS
- FCA
1 stop7h 49m
Delta
Fri 5/12:49 pm
FCA
- BOS
1 stop6h 46m
Delta
Deal found 4/12![Delta logo]()
$389
This Alaska Airlines deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/166:00 am
BOS
- FCA
1 stop13h 00m
Alaska Airlines
Sat 5/234:14 pm
FCA
- BOS
1 stop12h 06m
Alaska Airlines
Deal found 4/13![Alaska Airlines logo]()
$390
This United Airlines deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2811:00 am
BOS
- FCA
2 stops12h 27m
United Airlines
Sat 5/22:33 pm
FCA
- BOS
1 stop7h 26m
United Airlines
Deal found 4/13![United Airlines logo]()
$394
This Alaska Airlines deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/86:42 pm
BOS
- FCA
1 stop19h 29m
Alaska Airlines
Tue 5/121:43 pm
FCA
- BOS
1 stop8h 16m
Alaska Airlines
Deal found 4/13![Alaska Airlines logo]()
$403
This Delta deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/65:51 am
BOS
- FCA
1 stop9h 42m
Delta
Sat 6/133:03 pm
FCA
- BOS
1 stop6h 54m
Delta
Deal found 4/12![Delta logo]()
$408
This Delta deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/85:51 am
BOS
- FCA
1 stop9h 42m
Delta
Tue 5/125:13 am
FCA
- BOS
2 stops12h 02m
Delta
Deal found 4/13![Delta logo]()
$413
This American Airlines deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/225:05 am
BOS
- FCA
1 stop12h 58m
American Airlines
Sun 5/2412:25 pm
FCA
- BOS
1 stop9h 39m
American Airlines
Deal found 4/15![American Airlines logo]()
$416
Best flights from Boston to KalispellDiscover carefully curated flight deals from Boston to Kalispell that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 16, 2026.
Discover carefully curated flight deals from Boston to Kalispell that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 16, 2026.
This Delta deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/24:50 pm
BOS
- FCA
1 stop8h 37m
Delta
Sat 5/95:13 am
FCA
- BOS
2 stops12h 02m
Delta
Deal found 4/14![Delta logo]()
$378
This United Airlines deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/210:00 am
BOS
- FCA
2 stops13h 57m
United Airlines
Sat 5/92:33 pm
FCA
- BOS
1 stop7h 26m
United Airlines
Deal found 4/15![United Airlines logo]()
$378
This Alaska Airlines deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/166:00 am
BOS
- FCA
1 stop13h 00m
Alaska Airlines
Sat 5/2311:33 am
FCA
- BOS
1 stop10h 26m
Alaska Airlines
Deal found 4/12![Alaska Airlines logo]()
$390
This Delta deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/215:40 am
BOS
- FCA
1 stop10h 05m
Delta
Sat 9/2611:45 am
FCA
- BOS
1 stop8h 35m
Delta
Deal found 4/12![Delta logo]()
$408
This Alaska Airlines deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/287:11 pm
BOS
- FCA
1 stop17h 40m
Alaska Airlines
Sun 5/315:40 pm
FCA
- BOS
1 stop12h 01m
Alaska Airlines
Deal found 4/12![Alaska Airlines logo]()
$449
This Delta deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/85:51 am
BOS
- FCA
1 stop9h 42m
Delta
Tue 5/125:13 am
FCA
- BOS
2 stops12h 02m
Delta
Deal found 4/13![Delta logo]()
$413
This United Airlines deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/276:00 am
BOS
- FCA
3 stops12h 11m
United Airlines
Tue 6/210:42 am
FCA
- BOS
2 stops12h 17m
United Airlines
Deal found 4/12![United Airlines logo]()
$529
This Delta deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/96:00 pm
BOS
- FCA
1 stop7h 46m
Delta
Tue 9/156:12 pm
FCA
- BOS
1 stop9h 57m
Delta
Deal found 4/12![Delta logo]()
$454
This Delta deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/217:10 am
BOS
- FCA
2 stops12h 32m
Delta
Thu 8/276:59 am
FCA
- BOS
2 stops13h 28m
Delta
Deal found 4/15![Delta logo]()
$524
Last-minute flights from Boston to KalispellDiscover last-minute flight deals from Boston to Kalispell. Data last updated April 16, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Kalispell. Data last updated April 16, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/278:05 am
BOS
- FCA
1 stop7h 49m
Delta
Fri 5/12:49 pm
FCA
- BOS
1 stop6h 46m
Delta
Deal found 4/12![Delta logo]()
$389
This United Airlines deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2811:00 am
BOS
- FCA
2 stops12h 27m
United Airlines
Sat 5/22:33 pm
FCA
- BOS
1 stop7h 26m
United Airlines
Deal found 4/13![United Airlines logo]()
$394
This Delta deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/24:50 pm
BOS
- FCA
1 stop8h 37m
Delta
Sat 5/96:07 pm
FCA
- BOS
1 stop10h 13m
Delta
Deal found 4/14![Delta logo]()
$373
This Alaska Airlines deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/86:42 pm
BOS
- FCA
1 stop19h 29m
Alaska Airlines
Tue 5/121:43 pm
FCA
- BOS
1 stop8h 16m
Alaska Airlines
Deal found 4/13![Alaska Airlines logo]()
$403
This Delta deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/85:51 am
BOS
- FCA
1 stop9h 42m
Delta
Tue 5/125:13 am
FCA
- BOS
2 stops12h 02m
Delta
Deal found 4/13![Delta logo]()
$413
This Alaska Airlines deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/166:00 am
BOS
- FCA
1 stop13h 00m
Alaska Airlines
Sat 5/236:15 am
FCA
- BOS
1 stop8h 17m
Alaska Airlines
Deal found 4/13![Alaska Airlines logo]()
$390
This American Airlines deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/225:05 am
BOS
- FCA
1 stop12h 58m
American Airlines
Sun 5/2412:25 pm
FCA
- BOS
1 stop9h 39m
American Airlines
Deal found 4/15![American Airlines logo]()
$416
This American Airlines deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/237:00 am
BOS
- FCA
1 stop10h 00m
American Airlines
Sat 5/3012:25 pm
FCA
- BOS
1 stop9h 39m
American Airlines
Deal found 4/14![American Airlines logo]()
$357
This American Airlines deal was found by Cheapflights users on 4/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/276:00 am
BOS
- FCA
2 stops12h 03m
American Airlines
Tue 6/212:25 pm
FCA
- BOS
2 stops10h 15m
American Airlines
Deal found 4/12![American Airlines logo]()
$368
One-way flights from Boston to KalispellSearch for one-way flight options from Boston to Kalispell. Find affordable one-way fares based on user searches. Data last updated April 16, 2026.
Search for one-way flight options from Boston to Kalispell. Find affordable one-way fares based on user searches. Data last updated April 16, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/510:07 am
BOS
- FCA
3 stops51h 36m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$153
This American Airlines deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/246:00 am
BOS
- FCA
1 stop11h 00m
American Airlines
Deal found 4/14![American Airlines logo]()
$179
This Kiwi.com deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/1610:07 am
BOS
- FCA
3 stops27h 36m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$189
This Kiwi.com deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/66:00 am
BOS
- FCA
2 stops31h 43m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/1312:01 pm
BOS
- FCA
3 stops25h 42m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$195
This Delta deal was found by Cheapflights users on 4/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/151:00 pm
BOS
- FCA
2 stops12h 46m
Delta
Deal found 4/11![Delta logo]()
$200
This Alaska Airlines deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/66:42 pm
BOS
- FCA
1 stop19h 21m
Alaska Airlines
Deal found 4/14![Alaska Airlines logo]()
$217
Find flight deals from Boston to Kalispell
Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Kalispell (FCA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 16, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $357 (American Airlines) |
One-way from | $153 (Kiwi.com) |
Popular in | December |
Cheapest in | November |
Average price | $493 |
Cheapflights Fare Finder
Customize your flight search to find flights from Boston to Kalispell that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 16, 2026.
Use the filters below to find and compare flights from Boston to Kalispell that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BostonKalispell
BOS - FCA
BOSFCA
Boston Logan Intl
Sat 5/2
4:50 pm-11:27 pm
1 stop8h 37m
Kalispell Glacier Park
Sat 5/9
5:13 am-7:15 pm
2 stops12h 02m
$378
BostonKalispell
BOS - FCA
BOSFCA
Boston Logan Intl
Sat 5/2
10:00 am-9:57 pm
2 stops13h 57m
Kalispell Glacier Park
Sat 5/9
2:33 pm-11:59 pm
1 stop7h 26m
$378
BostonKalispell
BOS - FCA
BOSFCA
Boston Logan Intl
Sat 5/16
6:00 am-5:00 pm
1 stop13h 00m
Kalispell Glacier Park
Sat 5/23
11:33 am-11:59 pm
1 stop10h 26m
$390
BostonKalispell
BOS - FCA
BOSFCA
Boston Logan Intl
Mon 9/21
5:40 am-1:45 pm
1 stop10h 05m
Kalispell Glacier Park
Sat 9/26
11:45 am-10:20 pm
1 stop8h 35m
$408
BostonKalispell
BOS - FCA
BOSFCA
Boston Logan Intl
Fri 5/8
5:51 am-1:33 pm
1 stop9h 42m
Kalispell Glacier Park
Tue 5/12
5:13 am-7:15 pm
2 stops12h 02m
$413
BostonKalispell
BOS - FCA
BOSFCA
Boston Logan Intl
Thu 5/28
7:11 pm-10:51 am
1 stop17h 40m
Kalispell Glacier Park
Sun 5/31
5:40 pm-7:41 am
1 stop12h 01m
$449
Quickest round-trip
BostonKalispell
BOS - FCA
BOSFCA
Boston Logan Intl
Wed 9/9
6:00 pm-11:46 pm
1 stop7h 46m
Kalispell Glacier Park
Tue 9/15
6:12 pm-6:09 am
1 stop9h 57m
$454
BostonKalispell
BOS - FCA
BOSFCA
Boston Logan Intl
Fri 8/21
7:10 am-5:42 pm
2 stops12h 32m
Kalispell Glacier Park
Thu 8/27
6:59 am-10:27 pm
2 stops13h 28m
$524
BostonKalispell
BOS - FCA
BOSFCA
Boston Logan Intl
Wed 5/27
6:00 am-4:11 pm
3 stops12h 11m
Kalispell Glacier Park
Tue 6/2
10:42 am-12:59 am
2 stops12h 17m
$529
Cheapest one-way
Quickest one-way
BostonKalispell
BOS - FCA
BOSFCA
Boston Logan Intl
Tue 5/12
8:10 am-1:33 pm
1 stop7h 23m
$179
Showing 1-10 of 16 resultsSorted by cheapest first
Compare providers for flights from Boston to Kalispell
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Boston to Kalispell in April.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Boston-Kalispell flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boston-Kalispell flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Boston-Kalispell flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Boston-Kalispell flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boston-Kalispell flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Boston to Kalispell
Have a flexible travel schedule? Discover the best time to fly to Kalispell from Boston with our price prediction graph.
BOS-FCA
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Boston to Kalispell
How far ahead should I book a flight from Boston to Kalispell?
Use this chart to determine the optimal time to book a round-trip flight from Boston to Kalispell. Price data was last updated on April 10, 2026.
To ensure you get the cheapest price possible for a flight from Boston to Kalispell, you should look to book at least 90 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from Boston to Kalispell?
Currently, July is the cheapest month in which you can book a flight from Boston to Kalispell (average of $256). Flying from Boston to Kalispell in December is currently the most expensive (average of $396). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
How much does it cost to fly round-trip from Boston to Kalispell?
Reviews of airlines servicing Kalispell
Get insights into the airlines that provide service to Kalispell. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Kalispell. Reviews last updated April 16, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines,Delta, andUnited Airlines from Boston to Kalispell to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.9
Food
7.0
Entertainment
7.0
Crew
8.5
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Overall
7.9
Food
7.0
Entertainment
7.0
Crew
8.5
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Overall
7.9
Food
7.0
Entertainment
7.0
Crew
8.5
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Overall
7.9
Food
7.0
Entertainment
7.0
Crew
8.5
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Overall
7.9
Food
7.0
Entertainment
7.0
Crew
8.5
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Related info for your journey
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East Glacier Park
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Top 4 airlines flying from Boston to Kalispell
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| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$300 | Average$544 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$322 | Average$507 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$342 | Average$634 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$346 | Average$603 | FlexibilityNo cancel fee | On-time75% |