BOI

$81 Find Cheap Flights from Washington to Boise - 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 to Boise departing on 9/9. 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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Flight Deals

Cheap Flights from Washington to Boise

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington to Boise 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 Washington to Boise

Sat, Aug 29 - Sun, Aug 30
Alaska Airlines Logo
2:03 pm - 4:11 pm
GEG
-
BOI
1h 08mnonstop
Alaska Airlines Logo
7:30 am - 7:43 am
BOI
-
GEG
1h 13mnonstop
$155Alaska Airlines
Sat, Sep 26 - Tue, Sep 29
Delta Logo
2:45 pm - 5:19 pm
SEA
-
BOI
1h 34mnonstop
Delta Logo
3:28 pm - 4:10 pm
BOI
-
SEA
1h 42mnonstop
$157Delta
Wed, Oct 21 - Tue, Oct 27
Alaska Airlines Logo
7:17 am - 9:56 am
SEA
-
BOI
1h 39mnonstop
Alaska Airlines Logo
6:43 am - 7:20 am
BOI
-
SEA
1h 37mnonstop
$157Alaska Airlines
Tue, Dec 8 - Tue, Dec 15
Delta Logo
2:45 pm - 5:15 pm
SEA
-
BOI
1h 30mnonstop
Delta Logo
12:13 pm - 1:00 pm
BOI
-
SEA
1h 47mnonstop
$157Delta
Sat, Sep 5 - Sat, Sep 12
Alaska Airlines Logo
1:04 pm - 3:31 pm
SEA
-
BOI
1h 27mnonstop
Alaska Airlines Logo
2:16 pm - 2:52 pm
BOI
-
SEA
1h 36mnonstop
$157Alaska Airlines
Tue, Sep 1 - Sat, Sep 5
Delta Logo
2:45 pm - 5:19 pm
SEA
-
BOI
1h 34mnonstop
Delta Logo
3:29 pm - 4:10 pm
BOI
-
SEA
1h 41mnonstop
$157Delta
Sat, Sep 19 - Wed, Sep 23
Alaska Airlines Logo
7:15 am - 9:56 am
SEA
-
BOI
1h 41mnonstop
Alaska Airlines Logo
4:20 pm - 4:56 pm
BOI
-
SEA
1h 36mnonstop
$157Alaska Airlines
Sat, Sep 5 - Fri, Sep 11
Frontier Logo
12:20 pm - 11:29 am
PDX
-
BOI
22h 09m
1 stop
Frontier Logo
2:50 pm - 11:36 am
BOI
-
PDX
21h 46m
1 stop
$164Frontier
Sat, Sep 5 - Sat, Sep 12
Southwest Logo
5:00 am - 1:00 pm
SEA
-
BOI
7h 00m
1 stop
Southwest Logo
1:50 pm - 7:40 pm
BOI
-
SEA
6h 50m
1 stop
$177Southwest
Sat, Sep 12 - Sat, Sep 19
Southwest Logo
5:00 am - 1:00 pm
SEA
-
BOI
7h 00m
1 stop
Southwest Logo
6:10 am - 11:10 am
BOI
-
SEA
6h 00m
1 stop
$177Southwest
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Good to know

Low season

January

Cheapest flight

$81
Best time to beat the crowds with an average 20% drop in price.
Most popular time to fly and prices are also 8% lower on average.
Flight from Seattle to Boise

Flights from Washington to Boise: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Washington to Boise 
Learn how KAYAK collects reviews and tips from users.
AllieFlew with Alaska Airlines
GEG
-
BOI
May 2025
If you can, arrive at airport no sooner than 4 hours before flight.
Verified travelerFlew with Alaska Airlines
SEA
-
BOI
Feb 2024
Keep an eye on boarding time. At SEATAC, if you are not sitting at your exact gate, you cannot hear boarding announcements.

FAQs for booking flights from Washington to Boise

  • How does KAYAK find such low prices on flights from Washington to Boise?

    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 Washington to Boise.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Boise from Washington 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 Washington to Boise?

    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 to Boise with an airline and back to Washington with another airline.

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

    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 to Boise from Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near Boise?

Book flights to Boise if you plan to visit one of these locations
McCall
Ontario

Everything you need to know for your flight to Boise

Information on the airport you'll fly into in Boise

Boise (BOI)