$179+ 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 5/29. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — FCA
Jun 8 — Jun 151
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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
Cheapest
Best
Last-minute
One-way
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 May 9, 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 May 9, 2026.
This Delta deal was found by Cheapflights users on 5/5. 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.
Thu 5/285:51 am
BOS
- FCA
1 stop9h 42m
Delta
Fri 6/52:30 pm
FCA
- BOS
1 stop7h 24m
Delta
Deal found 5/5![Delta logo]()
$357
This Delta deal was found by Cheapflights users on 5/5. 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 5/291:29 pm
BOS
- FCA
2 stops11h 45m
Delta
Sat 6/62:30 pm
FCA
- BOS
1 stop7h 24m
Delta
Deal found 5/5![Delta logo]()
$362
This Delta deal was found by Cheapflights users on 5/8. 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.
Tue 6/26:10 am
BOS
- FCA
1 stop8h 29m
Delta
Tue 6/912:22 pm
FCA
- BOS
1 stop9h 27m
Delta
Deal found 5/8![Delta logo]()
$367
This American Airlines deal was found by Cheapflights users on 5/5. 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 5/278:00 am
BOS
- FCA
2 stops10h 03m
American Airlines
Fri 5/2912:25 pm
FCA
- BOS
2 stops10h 15m
American Airlines
Deal found 5/5![American Airlines logo]()
$368
This Alaska Airlines deal was found by Cheapflights users on 5/5. 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 5/234:48 pm
BOS
- FCA
1 stop9h 10m
Alaska Airlines
Sat 5/304:14 pm
FCA
- BOS
1 stop12h 06m
Alaska Airlines
Deal found 5/5![Alaska Airlines logo]()
$373
This Delta deal was found by Cheapflights users on 5/7. 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 5/233:15 pm
BOS
- FCA
2 stops9h 59m
Delta
Fri 5/295:13 am
FCA
- BOS
2 stops12h 48m
Delta
Deal found 5/7![Delta logo]()
$388
This Alaska Airlines deal was found by Cheapflights users on 5/5. 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 5/277:20 am
BOS
- FCA
1 stop10h 14m
Alaska Airlines
Fri 5/296:15 am
FCA
- BOS
1 stop8h 17m
Alaska Airlines
Deal found 5/5![Alaska Airlines logo]()
$390
This Delta deal was found by Cheapflights users on 5/8. 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 6/55:51 am
BOS
- FCA
1 stop9h 42m
Delta
Mon 6/86:10 pm
FCA
- BOS
2 stops12h 57m
Delta
Deal found 5/8![Delta logo]()
$394
This United Airlines deal was found by Cheapflights users on 5/6. 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.
Fri 8/217:00 am
BOS
- FCA
1 stop10h 21m
United Airlines
Thu 8/274:08 pm
FCA
- BOS
1 stop6h 57m
United Airlines
Deal found 5/6![United Airlines logo]()
$397
This Delta deal was found by Cheapflights users on 5/5. 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.
Thu 5/285:51 am
BOS
- FCA
1 stop9h 42m
Delta
Thu 6/46:07 pm
FCA
- BOS
1 stop10h 13m
Delta
Deal found 5/5![Delta logo]()
$408
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 May 9, 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 May 9, 2026.
This Delta deal was found by Cheapflights users on 5/5. 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 5/295:51 am
BOS
- FCA
1 stop9h 42m
Delta
Thu 6/46:07 pm
FCA
- BOS
1 stop10h 13m
Delta
Deal found 5/5![Delta logo]()
$424
This Alaska Airlines deal was found by Cheapflights users on 5/5. 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.
Mon 6/16:00 am
BOS
- FCA
2 stops19h 58m
Alaska Airlines
Fri 6/511:33 am
FCA
- BOS
1 stop10h 26m
Alaska Airlines
Deal found 5/5![Alaska Airlines logo]()
$440
This United Airlines deal was found by Cheapflights users on 5/7. 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 8/1811:00 am
BOS
- FCA
2 stops12h 32m
United Airlines
Tue 8/2510:47 am
FCA
- BOS
2 stops12h 18m
United Airlines
Deal found 5/7![United Airlines logo]()
$569
This Delta deal was found by Cheapflights users on 5/8. 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.
Thu 6/115:50 pm
BOS
- FCA
1 stop7h 48m
Delta
Mon 6/156:10 pm
FCA
- BOS
1 stop9h 55m
Delta
Deal found 5/8![Delta logo]()
$503
This Delta deal was found by Cheapflights users on 5/8. 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 9/91:00 pm
BOS
- FCA
2 stops12h 46m
Delta
Tue 9/156:12 pm
FCA
- BOS
1 stop9h 57m
Delta
Deal found 5/8![Delta logo]()
$504
This Alaska Airlines deal was found by Cheapflights users on 5/8. 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.
Mon 9/147:59 pm
BOS
- FCA
1 stop18h 19m
Alaska Airlines
Sat 9/198:21 pm
FCA
- BOS
1 stop9h 18m
Alaska Airlines
Deal found 5/8![Alaska Airlines logo]()
$567
This United Airlines deal was found by Cheapflights users on 5/5. 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 6/26:00 am
BOS
- FCA
3 stops12h 11m
United Airlines
Tue 6/910:42 am
FCA
- BOS
2 stops12h 32m
United Airlines
Deal found 5/5![United Airlines logo]()
$574
This Delta deal was found by Cheapflights users on 5/4. 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.
Thu 8/202:22 pm
BOS
- FCA
2 stops11h 29m
Delta
Mon 8/246:11 pm
FCA
- BOS
1 stop10h 19m
Delta
Deal found 5/4![Delta logo]()
$554
This Delta deal was found by Cheapflights users on 5/8. 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 8/217:12 am
BOS
- FCA
2 stops12h 17m
Delta
Thu 8/276:20 am
FCA
- BOS
2 stops13h 27m
Delta
Deal found 5/8![Delta logo]()
$559
This Delta deal was found by Cheapflights users on 5/9. 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.
Thu 6/41:10 pm
BOS
- FCA
2 stops12h 04m
Delta
Tue 6/96:10 pm
FCA
- BOS
2 stops12h 57m
Delta
Deal found 5/9![Delta logo]()
$568
This Delta deal was found by Cheapflights users on 5/5. 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 5/201:10 pm
BOS
- FCA
2 stops12h 04m
Delta
Sat 5/235:13 am
FCA
- BOS
2 stops12h 02m
Delta
Deal found 5/5![Delta logo]()
$589
Last-minute flights from Boston to KalispellDiscover last-minute flight deals from Boston to Kalispell. Data last updated May 9, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Kalispell. Data last updated May 9, 2026 and is based on user searches.
This Alaska Airlines deal was found by Cheapflights users on 5/5. 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 5/234:48 pm
BOS
- FCA
1 stop9h 10m
Alaska Airlines
Sat 5/304:14 pm
FCA
- BOS
1 stop12h 06m
Alaska Airlines
Deal found 5/5![Alaska Airlines logo]()
$373
This Delta deal was found by Cheapflights users on 5/7. 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 5/233:15 pm
BOS
- FCA
2 stops9h 59m
Delta
Fri 5/295:13 am
FCA
- BOS
2 stops12h 48m
Delta
Deal found 5/7![Delta logo]()
$388
This American Airlines deal was found by Cheapflights users on 5/5. 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 5/278:00 am
BOS
- FCA
2 stops10h 03m
American Airlines
Fri 5/2912:25 pm
FCA
- BOS
2 stops10h 15m
American Airlines
Deal found 5/5![American Airlines logo]()
$368
This Alaska Airlines deal was found by Cheapflights users on 5/5. 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 5/277:20 am
BOS
- FCA
1 stop10h 14m
Alaska Airlines
Fri 5/296:15 am
FCA
- BOS
1 stop8h 17m
Alaska Airlines
Deal found 5/5![Alaska Airlines logo]()
$390
This Delta deal was found by Cheapflights users on 5/5. 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.
Thu 5/285:51 am
BOS
- FCA
1 stop9h 42m
Delta
Fri 6/52:30 pm
FCA
- BOS
1 stop7h 24m
Delta
Deal found 5/5![Delta logo]()
$357
This Delta deal was found by Cheapflights users on 5/5. 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.
Thu 5/285:51 am
BOS
- FCA
1 stop9h 42m
Delta
Thu 6/46:07 pm
FCA
- BOS
1 stop10h 13m
Delta
Deal found 5/5![Delta logo]()
$408
This Delta deal was found by Cheapflights users on 5/5. 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 5/291:29 pm
BOS
- FCA
2 stops11h 45m
Delta
Sat 6/62:30 pm
FCA
- BOS
1 stop7h 24m
Delta
Deal found 5/5![Delta logo]()
$362
This Delta deal was found by Cheapflights users on 5/8. 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.
Tue 6/26:10 am
BOS
- FCA
1 stop8h 29m
Delta
Tue 6/912:22 pm
FCA
- BOS
1 stop9h 27m
Delta
Deal found 5/8![Delta logo]()
$367
This Delta deal was found by Cheapflights users on 5/8. 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 6/55:51 am
BOS
- FCA
1 stop9h 42m
Delta
Mon 6/86:10 pm
FCA
- BOS
2 stops12h 57m
Delta
Deal found 5/8![Delta logo]()
$394
This American Airlines deal was found by Cheapflights users on 5/5. 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.
Mon 6/85:00 am
BOS
- FCA
1 stop9h 45m
American Airlines
Mon 6/154:48 pm
FCA
- BOS
1 stop14h 42m
American Airlines
Deal found 5/5![American Airlines logo]()
$411
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 May 9, 2026.
Search for one-way flight options from Boston to Kalispell. Find affordable one-way fares based on user searches. Data last updated May 9, 2026.
This American Airlines deal was found by Cheapflights users on 5/6. 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 5/295:05 am
BOS
- FCA
1 stop9h 30m
American Airlines
Deal found 5/6![American Airlines logo]()
$179
This Delta deal was found by Cheapflights users on 5/7. 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.
Tue 9/82:00 pm
BOS
- FCA
2 stops11h 46m
Delta
Deal found 5/7![Delta logo]()
$189
This American Airlines deal was found by Cheapflights users on 5/5. 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 5/5![American Airlines logo]()
$195
This United Airlines deal was found by Cheapflights users on 5/6. 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 6/136:00 am
BOS
- FCA
1 stop7h 38m
United Airlines
Deal found 5/6![United Airlines logo]()
$213
This Delta deal was found by Cheapflights users on 5/8. 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 7/35:00 pm
BOS
- FCA
2 stops20h 02m
Delta
Deal found 5/8![Delta logo]()
$223
This American Airlines deal was found by Cheapflights users on 5/6. 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.
Tue 8/116:10 am
BOS
- FCA
1 stop8h 23m
American Airlines
Deal found 5/6![American Airlines logo]()
$230
This Delta deal was found by Cheapflights users on 5/8. 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 7/46:06 am
BOS
- FCA
2 stops12h 37m
Delta
Deal found 5/8![Delta logo]()
$235
This Kiwi.com deal was found by Cheapflights users on 5/8. 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.
Fri 7/36:30 am
BOS
- FCA
1 stop29h 30m
Sun Country Air
Deal found 5/8![Sun Country Air logo]()
$239
This United Airlines deal was found by Cheapflights users on 5/7. 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.
Fri 5/296:00 am
BOS
- FCA
3 stops12h 11m
United Airlines
Deal found 5/7![United Airlines logo]()
$244
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 May 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $357 (Delta) |
One-way from | $179 (American Airlines) |
Popular in | December |
Cheapest in | November |
Average price | $457 |
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 May 9, 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
Fri 5/29
5:51 am-1:33 pm
1 stop9h 42m
Kalispell Glacier Park
Thu 6/4
6:07 pm-6:20 am
1 stop10h 13m
$424
BostonKalispell
BOS - FCA
BOSFCA
Boston Logan Intl
Mon 6/1
6:00 am-11:58 pm
2 stops19h 58m
Kalispell Glacier Park
Fri 6/5
11:33 am-11:59 pm
1 stop10h 26m
$440
Quickest round-trip
BostonKalispell
BOS - FCA
BOSFCA
Boston Logan Intl
Thu 6/11
5:50 pm-11:38 pm
1 stop7h 48m
Kalispell Glacier Park
Mon 6/15
6:10 pm-6:05 am
1 stop9h 55m
$503
BostonKalispell
BOS - FCA
BOSFCA
Boston Logan Intl
Wed 9/9
1:00 pm-11:46 pm
2 stops12h 46m
Kalispell Glacier Park
Tue 9/15
6:12 pm-6:09 am
1 stop9h 57m
$504
BostonKalispell
BOS - FCA
BOSFCA
Boston Logan Intl
Thu 8/20
2:22 pm-11:51 pm
2 stops11h 29m
Kalispell Glacier Park
Mon 8/24
6:11 pm-6:30 am
1 stop10h 19m
$554
BostonKalispell
BOS - FCA
BOSFCA
Boston Logan Intl
Fri 8/21
7:12 am-5:29 pm
2 stops12h 17m
Kalispell Glacier Park
Thu 8/27
6:20 am-9:47 pm
2 stops13h 27m
$559
BostonKalispell
BOS - FCA
BOSFCA
Boston Logan Intl
Mon 9/14
7:59 pm-12:18 pm
1 stop18h 19m
Kalispell Glacier Park
Sat 9/19
8:21 pm-7:39 am
1 stop9h 18m
$567
BostonKalispell
BOS - FCA
BOSFCA
Boston Logan Intl
Thu 6/4
1:10 pm-11:14 pm
2 stops12h 04m
Kalispell Glacier Park
Tue 6/9
6:10 pm-9:07 am
2 stops12h 57m
$568
BostonKalispell
BOS - FCA
BOSFCA
Boston Logan Intl
Tue 8/18
11:00 am-9:32 pm
2 stops12h 32m
Kalispell Glacier Park
Tue 8/25
10:47 am-1:05 am
2 stops12h 18m
$569
BostonKalispell
BOS - FCA
BOSFCA
Boston Logan Intl
Tue 6/2
6:00 am-4:11 pm
3 stops12h 11m
Kalispell Glacier Park
Tue 6/9
10:42 am-1:14 am
2 stops12h 32m
$574
Showing 1-10 of 19 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 May.
| 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?
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, November is the cheapest month in which you can book a flight from Boston to Kalispell (average of $410). Flying from Boston to Kalispell in December is currently the most expensive (average of $979). 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 May 9, 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
Comfort
7.8
Crew
8.5
Entertainment
7.0
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Overall
7.9
Comfort
7.8
Crew
8.5
Entertainment
7.0
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Overall
7.9
Comfort
7.8
Crew
8.5
Entertainment
7.0
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Overall
7.9
Comfort
7.8
Crew
8.5
Entertainment
7.0
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Overall
7.9
Comfort
7.8
Crew
8.5
Entertainment
7.0
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Related info for your journey
Find useful and relevant information for your journey from Boston to Kalispell. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Kalispell?
Book flights to Kalispell if you plan to visit one of these locationsColumbia Falls
East Glacier Park
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Kalispell flight routes
Other flight options
Other flights from Boston
Popular flights
Alternative routes for Boston to Kalispell
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Kalispell by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Boston to Kalispell by cabin class
Find flights from Boston to Kalispell, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Kalispell
Explore flights to Kalispell departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on May 9, 2026.
Boston and Kalispell flights
Browse other Boston and Kalispell flight options. Last updated on May 9, 2026.
Other flights from Boston
Browse through other flights departing from Boston. Flights are based on user searches made on Cheapflights and were last updated on May 9, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 4 airlines flying from Boston to Kalispell
Discover the top 4 airlines that operate flights from Boston to Kalispell. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$316 | Average$546 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$322 | Average$497 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$342 | Average$635 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$346 | Average$603 | FlexibilityNo cancel fee | On-time75% |