$129 Find Cheap Flights from Boston to Idaho - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boston to Idaho departing on 8/25. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap Flights from Boston to Idaho

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Boise
Boise1 stop$257
Idaho Falls
Idaho Falls1 stop$379
Hailey
Hailey1 stop$429
Lewiston
Lewiston1 stop$512
Twin Falls
Twin Falls2 stops$489
Pocatello
Pocatello1 stop$724
Spokane
Spokane1 stop$277
Boise
Boise1 stop$257
Idaho Falls
Idaho Falls1 stop$379
Hailey
Hailey1 stop$429
Lewiston
Lewiston1 stop$512
Twin Falls
Twin Falls2 stops$489
Pocatello
Pocatello1 stop$724
Spokane
Spokane1 stop$277

Book Cheap Boston to Idaho Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boston to Idaho that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Boston to Idaho

Sun, Aug 23 - Sat, Aug 29
American Airlines Logo
7:10 am - 2:29 pm
BOS
-
BOI
9h 19m
1 stop
American Airlines Logo
2:58 pm - 11:58 pm
BOI
-
BOS
7h 00m
1 stop
$257American Airlines
Fri, Aug 21 - Sat, Aug 29
Southwest Logo
11:15 am - 8:40 pm
BOS
-
BOI
11h 25m
1 stop
Southwest Logo
1:50 pm - 12:25 am
BOI
-
BOS
8h 35m
1 stop
$257Southwest
Fri, Aug 21 - Sat, Aug 29
Southwest Logo
3:25 pm - 10:35 pm
BOS
-
BOI
9h 10m
2 stops
Southwest Logo
1:50 pm - 12:25 am
BOI
-
BOS
8h 35m
1 stop
$262Southwest
Sat, Aug 22 - Mon, Aug 24
Delta Logo
7:50 am - 3:18 pm
BOS
-
BOI
9h 28m
1 stop
Delta Logo
7:28 pm - 7:35 am
BOI
-
BOS
10h 07m
1 stop
$267Delta
Thu, Aug 20 - Fri, Aug 28
Delta Logo
7:45 am - 3:18 pm
BOS
-
BOI
9h 33m
1 stop
Delta Logo
12:23 pm - 12:17 am
BOI
-
BOS
9h 54m
1 stop
$267Delta
Thu, Aug 20 - Tue, Aug 25
American Airlines Logo
6:30 am - 2:09 pm
BOS
-
GEG
10h 39m
1 stop
American Airlines Logo
5:40 am - 5:45 pm
GEG
-
BOS
9h 05m
1 stop
$277American Airlines
Sat, Aug 29 - Sat, Sep 5
United Airlines Logo
5:45 am - 1:38 pm
BOS
-
BOI
9h 53m
2 stops
United Airlines Logo
10:36 am - 7:55 pm
BOI
-
BOS
7h 19m
1 stop
$295United Airlines
Wed, Aug 26 - Sat, Aug 29
United Airlines Logo
3:10 pm - 8:46 pm
BOS
-
GEG
8h 36m
1 stop
United Airlines Logo
1:37 pm - 11:50 pm
GEG
-
BOS
7h 13m
1 stop
$297United Airlines
Mon, Aug 31 - Mon, Sep 14
Alaska Airlines Logo
4:52 pm - 11:44 pm
BOS
-
BOI
8h 52m
1 stop
Alaska Airlines Logo
8:25 pm - 6:09 am
BOI
-
BOS
7h 44m
1 stop
$323Alaska Airlines
Wed, Sep 9 - Sat, Sep 19
Alaska Airlines Logo
5:42 pm - 11:55 pm
BOS
-
BOI
8h 13m
1 stop
Alaska Airlines Logo
1:31 pm - 6:09 am
BOI
-
BOS
14h 38m
1 stop
$323Alaska Airlines
Booking Insights

KAYAK's insights & trends for Boston to Idaho flights

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

How much is a round-trip flight from Boston to Idaho?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Boston to Idaho departing in August.

Flight prices are below average for this route right now.

Flights to Idaho from Boston usually cost between $394 and $571 in August.
The lowest price found in the past 5 days was $257 on American Airlines (Aug 23-Aug 29).

What is the cheapest month to fly from Boston to Idaho?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Boston to Idaho, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Boston to Idaho is May, when tickets cost $424 (return) on average. On the other hand, the most expensive months are June and December, when the average cost of round-trip tickets is $631 and $598 respectively.

How far in advance should I book a flight from Boston to Idaho?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Boston to Idaho, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Boston to Idaho, you should book around 4 weeks before departure, which saves you about 46% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Find deals

Good to know

Low season

November

Cheapest flight

$129
Best time to beat the crowds with an average 14% drop in price.
Flight from Boston to Boise

FAQs - booking Idaho flights

  • How does KAYAK find such low prices on flights from Boston to Idaho?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Boston to Idaho.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Boston to Idaho?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Boston to Idaho is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Boston to Idaho?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Boston to Idaho with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Boston to Idaho?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Boston to Idaho up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight from Boston to Idaho

Information on your arrival and departure airports

Boston (BOS)