$280+ Cheap flights from Boston to Idaho Falls (BOS - IDA)
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 9/18. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — IDA
Oct 1 — Oct 81
Round-trip
1 adult, Economy
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Find cheap flights from Boston to Idaho Falls 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
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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 Idaho Falls
Cheapest
Best
Last-minute
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Cheapest flights from Boston to Idaho FallsExplore the most affordable flight options available from Boston to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 1, 2026.
Explore the most affordable flight options available from Boston to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 1, 2026.
This Delta deal was found by Cheapflights users on 8/28. 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.
Wed 11/44:15 pm -
1 stop7h 55m
Sun 11/86:56 pm -
1 stop9h 29m
Deal found 8/28![Delta logo]()
$379
This United Airlines deal was found by Cheapflights users on 8/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:01 am -
2 stops10h 23m
Sat 10/242:28 pm -
1 stop7h 31m
Deal found 8/28![United Airlines logo]()
$406
This Alaska Airlines deal was found by Cheapflights users on 8/31. 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 10/37:09 am -
1 stop10h 11m
Sat 10/103:57 pm -
1 stop12h 15m
Deal found 8/31![Alaska Airlines logo]()
$433
This Expedia deal was found by Cheapflights users on 8/29. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/227:59 pm -
1 stop21h 21m
Tue 10/63:57 pm -
1 stop12h 15m
Deal found 8/29![Alaska Airlines logo]()
$436
This Booking.com deal was found by Cheapflights users on 8/31. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/296:40 pm -
1 stop22h 40m
Sun 11/13:55 pm -
1 stop13h 25m
Deal found 8/31![Alaska Airlines logo]()
$439
This Delta deal was found by Cheapflights users on 8/31. 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 10/26:05 am -
1 stop8h 10m
Tue 10/66:56 pm -
2 stops14h 19m
Deal found 8/31![Delta logo]()
$444
This Expedia deal was found by Cheapflights users on 8/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/236:40 pm -
1 stop22h 40m
Tue 10/276:09 am -
2 stops21h 19m
Deal found 8/28![Alaska Airlines logo]()
$448
This United Airlines deal was found by Cheapflights users on 8/29. 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 9/229:35 am -
1 stop7h 48m
Tue 10/610:35 am -
2 stops10h 49m
Deal found 8/29![United Airlines logo]()
$456
This American Airlines deal was found by Cheapflights users on 8/28. 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.
Sat 10/317:00 am -
1 stop8h 19m
Wed 11/48:00 am -
2 stops11h 46m
Deal found 8/28![American Airlines logo]()
$470
This American Airlines deal was found by Cheapflights users on 8/30. 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 10/36:00 am -
1 stop9h 28m
Mon 10/51:50 pm -
1 stop6h 47m
Deal found 8/30![American Airlines logo]()
$475
Best flights from Boston to Idaho FallsDiscover carefully curated flight deals from Boston to Idaho Falls that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 1, 2026.
Discover carefully curated flight deals from Boston to Idaho Falls that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 1, 2026.
This Delta deal was found by Cheapflights users on 8/28. 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.
Wed 11/44:15 pm -
1 stop7h 55m
Sun 11/86:56 pm -
1 stop9h 29m
Deal found 8/28![Delta logo]()
$379
This Alaska Airlines deal was found by Cheapflights users on 8/29. 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 10/37:09 am -
1 stop10h 11m
Sat 10/103:57 pm -
1 stop12h 15m
Deal found 8/29![Alaska Airlines logo]()
$433
This United Airlines deal was found by Cheapflights users on 8/31. 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 1/89:30 am -
2 stops13h 38m
Tue 1/122:35 pm -
1 stop7h 20m
Deal found 8/31![United Airlines logo]()
$494
This Delta deal was found by Cheapflights users on 9/1. 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 12/311:00 am -
1 stop9h 17m
Mon 12/76:59 pm -
2 stops14h 14m
Deal found 9/1![Delta logo]()
$444
This Delta deal was found by Cheapflights users on 9/1. 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.
Sun 9/276:05 am -
1 stop8h 10m
Tue 9/296:57 pm -
2 stops14h 18m
Deal found 9/1![Delta logo]()
$534
Last-minute flights from Boston to Idaho FallsDiscover last-minute flight deals from Boston to Idaho Falls. Data last updated September 1, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Idaho Falls. Data last updated September 1, 2026 and is based on user searches.
This Expedia deal was found by Cheapflights users on 8/29. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/227:59 pm -
1 stop21h 21m
Tue 10/63:57 pm -
1 stop12h 15m
Deal found 8/29![Alaska Airlines logo]()
$436
This United Airlines deal was found by Cheapflights users on 8/29. 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 9/229:35 am -
1 stop7h 48m
Tue 10/610:35 am -
2 stops10h 49m
Deal found 8/29![United Airlines logo]()
$456
This Delta deal was found by Cheapflights users on 8/31. 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 10/26:05 am -
1 stop8h 10m
Tue 10/66:56 pm -
2 stops14h 19m
Deal found 8/31![Delta logo]()
$444
This Alaska Airlines deal was found by Cheapflights users on 8/31. 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 10/37:09 am -
1 stop10h 11m
Sat 10/103:57 pm -
1 stop12h 15m
Deal found 8/31![Alaska Airlines logo]()
$433
This American Airlines deal was found by Cheapflights users on 8/30. 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 10/36:00 am -
1 stop9h 28m
Mon 10/51:50 pm -
1 stop6h 47m
Deal found 8/30![American Airlines logo]()
$475
This Expedia deal was found by Cheapflights users on 8/30. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/37:09 am -
1 stop10h 11m
Tue 10/61:58 pm -
1 stop15h 28m
Deal found 8/30![Alaska Airlines logo]()
$485
This Delta deal was found by Cheapflights users on 8/28. 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.
Fri 10/166:05 am -
1 stop8h 17m
Sat 10/241:05 pm -
1 stop8h 54m
Deal found 8/28![Delta logo]()
$379
This Alaska Airlines deal was found by Cheapflights users on 8/28. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/167:03 am -
1 stop10h 17m
Sun 10/256:09 am -
1 stop9h 26m
Deal found 8/28![Alaska Airlines logo]()
$488
This United Airlines deal was found by Cheapflights users on 8/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:01 am -
2 stops10h 23m
Sat 10/242:28 pm -
1 stop7h 31m
Deal found 8/28![United Airlines logo]()
$406
This Expedia deal was found by Cheapflights users on 8/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/236:40 pm -
1 stop22h 40m
Tue 10/276:09 am -
2 stops21h 19m
Deal found 8/28![Alaska Airlines logo]()
$448
This Booking.com deal was found by Cheapflights users on 8/31. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/296:40 pm -
1 stop22h 40m
Sun 11/13:55 pm -
1 stop13h 25m
Deal found 8/31![Alaska Airlines logo]()
$439
This American Airlines deal was found by Cheapflights users on 8/28. 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.
Sat 10/317:00 am -
1 stop8h 19m
Wed 11/48:00 am -
2 stops11h 46m
Deal found 8/28![American Airlines logo]()
$470
One-way flights from Boston to Idaho FallsSearch for one-way flight options from Boston to Idaho Falls. Find affordable one-way fares based on user searches. Data last updated September 1, 2026.
Search for one-way flight options from Boston to Idaho Falls. Find affordable one-way fares based on user searches. Data last updated September 1, 2026.
This American Airlines deal was found by Cheapflights users on 8/31. 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 9/186:02 am -
1 stop9h 35m
Deal found 8/31![American Airlines logo]()
$280
This Delta deal was found by Cheapflights users on 8/31. 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 9/188:15 am -
2 stops12h 02m
Deal found 8/31![Delta logo]()
$315
This Kiwi.com deal was found by Cheapflights users on 8/31. 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 9/186:30 pm -
3 stops20h 54m
Deal found 8/31![Multiple Airlines logo]()
$724
Find flight deals from Boston to Idaho Falls
Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Idaho Falls (IDA). 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 September 1, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $379 (Delta) |
One-way from | $280 (American Airlines) |
Popular in | December |
Cheapest in | January |
Average price | $581 |
Cheapflights Fare Finder
Customize your flight search to find flights from Boston to Idaho Falls 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 7,457,451 searches. Data last updated September 1, 2026.
Use the filters below to find and compare flights from Boston to Idaho Falls that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
BostonIdaho Falls
BOS Boston Logan Intl - IDA Idaho Falls Fanning Field
BOSIDA
Boston Logan Intl
Wed 11/4
4:15 pm-10:10 pm
1 stop7h 55m
Idaho Falls Fanning Field
Sun 11/8
6:56 pm-6:25 am
1 stop9h 29m
$379
BostonIdaho Falls
BOS Boston Logan Intl - IDA Idaho Falls Fanning Field
BOSIDA
Boston Logan Intl
Sat 10/3
7:09 am-3:20 pm
1 stop10h 11m
Idaho Falls Fanning Field
Sat 10/10
3:57 pm-6:12 am
1 stop12h 15m
$433
BostonIdaho Falls
BOS Boston Logan Intl - IDA Idaho Falls Fanning Field
BOSIDA
Boston Logan Intl
Thu 12/3
11:00 am-6:17 pm
1 stop9h 17m
Idaho Falls Fanning Field
Mon 12/7
6:59 pm-11:13 am
2 stops14h 14m
$444
BostonIdaho Falls
BOS Boston Logan Intl - IDA Idaho Falls Fanning Field
BOSIDA
Boston Logan Intl
Fri 1/8
9:30 am-9:08 pm
2 stops13h 38m
Idaho Falls Fanning Field
Tue 1/12
2:35 pm-11:55 pm
1 stop7h 20m
$494
BostonIdaho Falls
BOS Boston Logan Intl - IDA Idaho Falls Fanning Field
BOSIDA
Boston Logan Intl
Sun 9/27
6:05 am-12:15 pm
1 stop8h 10m
Idaho Falls Fanning Field
Tue 9/29
6:57 pm-11:15 am
2 stops14h 18m
$534
Cheapest one-way
Quickest one-way
BostonIdaho Falls
BOS Boston Logan Intl - IDA Idaho Falls Fanning Field
BOSIDA
Boston Logan Intl
Fri 9/18
6:02 am-1:37 pm
1 stop9h 35m
$280
BostonIdaho Falls
BOS Boston Logan Intl - IDA Idaho Falls Fanning Field
BOSIDA
Boston Logan Intl
Fri 9/18
8:15 am-6:17 pm
2 stops12h 02m
$315
BostonIdaho Falls
BOS Boston Logan Intl - IDA Idaho Falls Fanning Field
BOSIDA
Boston Logan Intl
Fri 9/18
6:30 pm-1:24 pm
3 stops20h 54m
$724
Sorted by cheapest first
Compare providers for flights from Boston to Idaho Falls
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 Idaho Falls in September.
| 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 Boston-Idaho Falls flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boston-Idaho Falls flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Boston-Idaho Falls flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Boston-Idaho Falls 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-Idaho Falls 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 Idaho Falls
Have a flexible travel schedule? Discover the best time to fly to Idaho Falls from Boston with our price prediction graph.
BOS-IDA
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 Idaho Falls
Reviews of airlines servicing Idaho Falls
Get insights into the airlines that provide service to Idaho Falls. 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 Idaho Falls. Reviews last updated September 1, 2026.
Get a feel of what it's like to fly with Alaska Airlines,United Airlines, andAmerican Airlines from Boston to Idaho Falls by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Comfort
7.8
Entertainment
7.0
Boarding
8.1
Crew
8.5
Overall
7.9
Reviews
1 / 20
2.0
MediocreChris,Aug 2026
GEG - SFO
Food
7.0
Comfort
7.8
Entertainment
7.0
Boarding
8.1
Crew
8.5
Overall
7.9
Reviews
1 / 20
2.0
MediocreChris,Aug 2026
GEG - SFO
Food
7.0
Comfort
7.8
Entertainment
7.0
Boarding
8.1
Crew
8.5
Overall
7.9
Reviews
1 / 20
2.0
MediocreChris,Aug 2026
GEG - SFO
Food
7.0
Comfort
7.8
Entertainment
7.0
Boarding
8.1
Crew
8.5
Overall
7.9
Reviews
1 / 20
2.0
MediocreChris,Aug 2026
GEG - SFO
Related info for your journey
Find useful and relevant information for your journey from Boston to Idaho Falls. 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 Idaho Falls?
Book flights to Idaho Falls if you plan to visit one of these locationsRexburg
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Complete your trip
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Other flights to Idaho Falls
Explore flights to Idaho Falls departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 1, 2026.
Boston and Idaho Falls flights
Browse other Boston and Idaho Falls flight options. Last updated on September 1, 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 September 1, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 3 airlines flying from Boston to Idaho Falls
Discover the top 3 airlines that operate flights from Boston to Idaho Falls. 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 7,457,451 searches. Data last updated September 1, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$395 | Average$581 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$435 | Average$620 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$468 | Average$748 | FlexibilityNo cancel fee | On-time75% |