$179+ Cheap flights from Kalispell to Boston (FCA - BOS)
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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
FCA — BOS
May 28 — Jun 41
Round-trip
1 adult, Economy
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Cheapest flights from Kalispell to BostonExplore the most affordable flight options available from Kalispell to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 28, 2026.
Explore the most affordable flight options available from Kalispell to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 28, 2026.
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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 11/77:35 pm
FCA
- BOS
1 stop10h 27m
Alaska Airlines
Tue 11/109:20 am
BOS
- FCA
1 stop11h 34m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$357
This American Airlines deal was found by Cheapflights users on 4/27. 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 5/2312:25 pm
FCA
- BOS
1 stop9h 39m
American Airlines
Mon 5/256:00 am
BOS
- FCA
2 stops11h 00m
American Airlines
Deal found 4/27![American Airlines logo]()
$362
This Delta deal was found by Cheapflights users on 4/28. 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 10/221:29 pm
FCA
- BOS
1 stop6h 55m
Delta
Mon 10/265:40 am
BOS
- FCA
1 stop8h 49m
Delta
Deal found 4/28![Delta logo]()
$373
This Delta deal was found by Cheapflights users on 4/26. 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 6/236:10 pm
FCA
- BOS
2 stops12h 57m
Delta
Tue 6/308:05 am
BOS
- FCA
2 stops14h 11m
Delta
Deal found 4/26![Delta logo]()
$384
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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.
Tue 9/228:21 pm
FCA
- BOS
1 stop9h 18m
Alaska Airlines
Sat 10/36:32 pm
BOS
- FCA
1 stop19h 42m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$403
This American Airlines deal was found by Cheapflights users on 4/25. 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 9/2212:35 pm
FCA
- BOS
1 stop9h 20m
American Airlines
Sat 10/35:32 am
BOS
- FCA
1 stop8h 55m
American Airlines
Deal found 4/25![American Airlines logo]()
$408
This American Airlines deal was found by Cheapflights users on 4/24. 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 5/264:45 pm
FCA
- BOS
1 stop15h 44m
American Airlines
Tue 6/97:00 am
BOS
- FCA
2 stops11h 02m
American Airlines
Deal found 4/24![American Airlines logo]()
$435
This Delta deal was found by Cheapflights users on 4/23. 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 9/116:12 pm
FCA
- BOS
1 stop9h 57m
Delta
Mon 9/215:40 am
BOS
- FCA
1 stop10h 05m
Delta
Deal found 4/23![Delta logo]()
$438
Best flights from Kalispell to BostonDiscover carefully curated flight deals from Kalispell to Boston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 28, 2026.
Discover carefully curated flight deals from Kalispell to Boston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 28, 2026.
This Delta deal was found by Cheapflights users on 4/24. 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 10/221:29 pm
FCA
- BOS
1 stop8h 24m
Delta
Mon 10/265:40 am
BOS
- FCA
1 stop8h 49m
Delta
Deal found 4/24![Delta logo]()
$357
This Alaska Airlines deal was found by Cheapflights users on 4/26. 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.
Tue 6/25:40 pm
FCA
- BOS
1 stop12h 01m
Alaska Airlines
Fri 6/57:11 pm
BOS
- FCA
1 stop17h 40m
Alaska Airlines
Deal found 4/26![Alaska Airlines logo]()
$357
This American Airlines deal was found by Cheapflights users on 4/28. 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.
Thu 10/151:24 pm
FCA
- BOS
1 stop6h 41m
American Airlines
Mon 10/195:24 am
BOS
- FCA
1 stop9h 04m
American Airlines
Deal found 4/28![American Airlines logo]()
$477
This Delta deal was found by Cheapflights users on 4/24. 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 6/62:30 pm
FCA
- BOS
1 stop7h 24m
Delta
Sat 6/135:55 am
BOS
- FCA
1 stop10h 01m
Delta
Deal found 4/24![Delta logo]()
$357
This Delta deal was found by Cheapflights users on 4/23. 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 6/32:30 pm
FCA
- BOS
1 stop7h 24m
Delta
Sat 6/68:10 am
BOS
- FCA
2 stops11h 17m
Delta
Deal found 4/23![Delta logo]()
$362
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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.
Tue 9/228:21 pm
FCA
- BOS
1 stop9h 18m
Alaska Airlines
Sat 10/36:32 pm
BOS
- FCA
1 stop19h 42m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$403
This American Airlines deal was found by Cheapflights users on 4/27. 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 9/1812:35 pm
FCA
- BOS
1 stop8h 35m
American Airlines
Sat 10/36:30 am
BOS
- FCA
2 stops11h 26m
American Airlines
Deal found 4/27![American Airlines logo]()
$506
This Alaska Airlines deal was found by Cheapflights users on 4/26. 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 5/117:28 pm
FCA
- BOS
1 stop9h 44m
Alaska Airlines
Fri 5/154:48 pm
BOS
- FCA
1 stop9h 10m
Alaska Airlines
Deal found 4/26![Alaska Airlines logo]()
$545
This Delta deal was found by Cheapflights users on 4/28. 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 10/81:29 pm
FCA
- BOS
1 stop8h 24m
Delta
Mon 10/125:40 am
BOS
- FCA
1 stop8h 49m
Delta
Deal found 4/28![Delta logo]()
$529
This Delta deal was found by Cheapflights users on 4/23. 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 9/103:00 pm
FCA
- BOS
2 stops14h 43m
Delta
Mon 9/215:40 am
BOS
- FCA
1 stop10h 05m
Delta
Deal found 4/23![Delta logo]()
$556
This Delta deal was found by Cheapflights users on 4/23. 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 9/106:12 pm
FCA
- BOS
1 stop9h 57m
Delta
Sat 9/197:30 am
BOS
- FCA
2 stops17h 32m
Delta
Deal found 4/23![Delta logo]()
$562
Last-minute flights from Kalispell to BostonDiscover last-minute flight deals from Kalispell to Boston. Data last updated April 28, 2026 and is based on user searches.
Discover last-minute flight deals from Kalispell to Boston. Data last updated April 28, 2026 and is based on user searches.
This Alaska Airlines deal was found by Cheapflights users on 4/23. 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 5/117:28 pm
FCA
- BOS
1 stop9h 44m
Alaska Airlines
Sat 5/167:20 am
BOS
- FCA
1 stop10h 14m
Alaska Airlines
Deal found 4/23![Alaska Airlines logo]()
$479
This Delta deal was found by Cheapflights users on 4/23. 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 5/115:13 am
FCA
- BOS
2 stops12h 48m
Delta
Sat 5/168:10 am
BOS
- FCA
2 stops11h 17m
Delta
Deal found 4/23![Delta logo]()
$484
This Alaska Airlines deal was found by Cheapflights users on 4/26. 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 5/117:28 pm
FCA
- BOS
1 stop9h 44m
Alaska Airlines
Fri 5/154:48 pm
BOS
- FCA
1 stop9h 10m
Alaska Airlines
Deal found 4/26![Alaska Airlines logo]()
$545
This United Airlines deal was found by Cheapflights users on 4/27. 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 5/2212:35 pm
FCA
- BOS
1 stop8h 45m
United Airlines
Mon 5/256:00 am
BOS
- FCA
1 stop7h 29m
United Airlines
Deal found 4/27![United Airlines logo]()
$467
This American Airlines deal was found by Cheapflights users on 4/27. 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 5/221:25 pm
FCA
- BOS
1 stop8h 50m
American Airlines
Mon 5/256:00 am
BOS
- FCA
2 stops11h 00m
American Airlines
Deal found 4/27![American Airlines logo]()
$472
This Delta deal was found by Cheapflights users on 4/27. 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 5/2212:20 pm
FCA
- BOS
2 stops32h 41m
Delta
Mon 5/256:15 am
BOS
- FCA
2 stops33h 18m
Delta
Deal found 4/27![Delta logo]()
$560
This American Airlines deal was found by Cheapflights users on 4/27. 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 5/2312:25 pm
FCA
- BOS
1 stop9h 39m
American Airlines
Mon 5/257:00 am
BOS
- FCA
1 stop7h 35m
American Airlines
Deal found 4/27![American Airlines logo]()
$357
This Alaska Airlines deal was found by Cheapflights users on 4/24. 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.
Tue 5/264:14 pm
FCA
- BOS
1 stop12h 06m
Alaska Airlines
Tue 6/97:11 pm
BOS
- FCA
1 stop17h 37m
Alaska Airlines
Deal found 4/24![Alaska Airlines logo]()
$403
This American Airlines deal was found by Cheapflights users on 4/24. 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 5/264:45 pm
FCA
- BOS
1 stop15h 44m
American Airlines
Tue 6/97:00 am
BOS
- FCA
2 stops11h 02m
American Airlines
Deal found 4/24![American Airlines logo]()
$435
This American Airlines deal was found by Cheapflights users on 4/27. 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 5/2712:25 pm
FCA
- BOS
2 stops10h 15m
American Airlines
Sun 5/316:00 am
BOS
- FCA
2 stops12h 03m
American Airlines
Deal found 4/27![American Airlines logo]()
$464
One-way flights from Kalispell to BostonSearch for one-way flight options from Kalispell to Boston. Find affordable one-way fares based on user searches. Data last updated April 28, 2026.
Search for one-way flight options from Kalispell to Boston. Find affordable one-way fares based on user searches. Data last updated April 28, 2026.
This United Airlines deal was found by Cheapflights users on 4/27. 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.
Thu 9/104:08 pm
FCA
- BOS
1 stop6h 57m
United Airlines
Deal found 4/27![United Airlines logo]()
$179
This United Airlines deal was found by Cheapflights users on 4/27. 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.
Thu 5/2112:35 pm
FCA
- BOS
1 stop8h 46m
United Airlines
Deal found 4/27![United Airlines logo]()
$213
This Alaska Airlines deal was found by Cheapflights users on 4/26. 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 9/238:21 pm
FCA
- BOS
1 stop9h 18m
Alaska Airlines
Deal found 4/26![Alaska Airlines logo]()
$225
This United Airlines deal was found by Cheapflights users on 4/26. 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 9/231:20 pm
FCA
- BOS
2 stops14h 39m
United Airlines
Deal found 4/26![United Airlines logo]()
$239
This United Airlines deal was found by Cheapflights users on 4/26. 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 9/164:17 pm
FCA
- BOS
1 stop11h 33m
United Airlines
Deal found 4/26![United Airlines logo]()
$247
This United Airlines deal was found by Cheapflights users on 4/26. 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 9/154:17 pm
FCA
- BOS
1 stop11h 33m
United Airlines
Deal found 4/26![United Airlines logo]()
$250
This Delta deal was found by Cheapflights users on 4/25. 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 9/243:00 pm
FCA
- BOS
1 stop6h 52m
Delta
Deal found 4/25![Delta logo]()
$260
This Delta deal was found by Cheapflights users on 4/27. 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 9/116:59 am
FCA
- BOS
2 stops13h 28m
Delta
Deal found 4/27![Delta logo]()
$265
This United Airlines deal was found by Cheapflights users on 4/27. 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 9/124:17 pm
FCA
- BOS
1 stop11h 33m
United Airlines
Deal found 4/27![United Airlines logo]()
$267
This Delta deal was found by Cheapflights users on 4/26. 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 9/256:59 am
FCA
- BOS
2 stops13h 28m
Delta
Deal found 4/26![Delta logo]()
$280
Find flight deals from Kalispell to Boston
Discover tips and strategies to find the most affordable flight options for your journey from Kalispell (FCA) to Boston (BOS). 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 28, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $357 (Delta) |
One-way from | $179 (United Airlines) |
Popular in | February |
Cheapest in | December |
Average price | $466 |
Cheapflights Fare Finder
Customize your flight search to find flights from Kalispell to Boston 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 28, 2026.
Use the filters below to find and compare flights from Kalispell to Boston that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
KalispellBoston
FCA - BOS
FCABOS
Kalispell Glacier Park
Thu 10/22
1:29 pm-11:53 pm
1 stop8h 24m
Boston Logan Intl
Mon 10/26
5:40 am-12:29 pm
1 stop8h 49m
$357
KalispellBoston
FCA - BOS
FCABOS
Kalispell Glacier Park
Tue 6/2
5:40 pm-7:41 am
1 stop12h 01m
Boston Logan Intl
Fri 6/5
7:11 pm-10:51 am
1 stop17h 40m
$357
KalispellBoston
FCA - BOS
FCABOS
Kalispell Glacier Park
Sat 6/6
2:30 pm-11:54 pm
1 stop7h 24m
Boston Logan Intl
Sat 6/13
5:55 am-1:56 pm
1 stop10h 01m
$357
KalispellBoston
FCA - BOS
FCABOS
Kalispell Glacier Park
Wed 6/3
2:30 pm-11:54 pm
1 stop7h 24m
Boston Logan Intl
Sat 6/6
8:10 am-5:27 pm
2 stops11h 17m
$362
KalispellBoston
FCA - BOS
FCABOS
Kalispell Glacier Park
Tue 9/22
8:21 pm-7:39 am
1 stop9h 18m
Boston Logan Intl
Sat 10/3
6:32 pm-12:14 pm
1 stop19h 42m
$403
Quickest round-trip
KalispellBoston
FCA - BOS
FCABOS
Kalispell Glacier Park
Thu 10/15
1:24 pm-10:05 pm
1 stop6h 41m
Boston Logan Intl
Mon 10/19
5:24 am-12:28 pm
1 stop9h 04m
$477
KalispellBoston
FCA - BOS
FCABOS
Kalispell Glacier Park
Fri 9/18
12:35 pm-11:10 pm
1 stop8h 35m
Boston Logan Intl
Sat 10/3
6:30 am-3:56 pm
2 stops11h 26m
$506
KalispellBoston
FCA - BOS
FCABOS
Kalispell Glacier Park
Thu 10/8
1:29 pm-11:53 pm
1 stop8h 24m
Boston Logan Intl
Mon 10/12
5:40 am-12:29 pm
1 stop8h 49m
$529
KalispellBoston
FCA - BOS
FCABOS
Kalispell Glacier Park
Mon 5/11
7:28 pm-7:12 am
1 stop9h 44m
Boston Logan Intl
Fri 5/15
4:48 pm-11:58 pm
1 stop9h 10m
$545
KalispellBoston
FCA - BOS
FCABOS
Kalispell Glacier Park
Thu 9/10
3:00 pm-7:43 am
2 stops14h 43m
Boston Logan Intl
Mon 9/21
5:40 am-1:45 pm
1 stop10h 05m
$556
Showing 1-10 of 22 resultsSorted by cheapest first
Compare providers for flights from Kalispell to Boston
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 Kalispell to Boston in April.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Kalispell-Boston flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Kalispell-Boston flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Kalispell-Boston flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Kalispell-Boston 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 Kalispell-Boston 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 Kalispell to Boston
Have a flexible travel schedule? Discover the best time to fly to Boston from Kalispell with our price prediction graph.
FCA-BOS
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 Kalispell to Boston
Reviews of airlines servicing Boston
Get insights into the airlines that provide service to Boston. 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 Boston. Reviews last updated April 28, 2026.
Peruse reviews from past customers who have flown with Delta and United Airlines from Kalispell to Boston 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.
Crew
8.5
Overall
7.9
Comfort
7.9
Food
7.2
Boarding
8.1
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Overall
7.9
Comfort
7.9
Food
7.2
Boarding
8.1
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Overall
7.9
Comfort
7.9
Food
7.2
Boarding
8.1
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Related info for your journey
Find useful and relevant information for your journey from Kalispell to Boston. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Top 2 airlines flying from Kalispell to Boston
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| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$286 | Average$504 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$381 | Average$568 | FlexibilityNo cancel fee | On-time69% |