Cheap Flights to Southwest Idaho , ID from CA $137

View CA $137 flight on Tue, Jun 2, 2026Opens in a new window

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How much is the cheapest flight to Southwest Idaho?

Prices were available within the past 7 days and start at CA $137 for one-way flights and CA $219 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Jun 2 - Sat, Jun 6
SEA
Seattle
BOI
Boise
CA $219 Roundtrip, found 3 days ago
CA $219
Roundtrip
found 3 days ago
Select Delta flight, departing Tue, Jun 2 from Seattle to Boise, returning Sat, Jun 6, priced at CA $219 found 3 days ago
Alaska Airlines
Sat, May 2 - Sat, May 9
SEA
Seattle
BOI
Boise
CA $227 Roundtrip, found 5 days ago
CA $227
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Sat, May 2 from Seattle to Boise, returning Sat, May 9, priced at CA $227 found 5 days ago
United
Tue, May 5 - Tue, May 12
SEA
Seattle
BOI
Boise
CA $369 Roundtrip, found 1 day ago
CA $369
Roundtrip
found 1 day ago
Select United flight, departing Tue, May 5 from Seattle to Boise, returning Tue, May 12, priced at CA $369 found 1 day ago
Air Canada
Sun, Sep 6 - Sat, Sep 26
YEG
Edmonton
BOI
Boise
CA $472 Roundtrip, found 15 hours ago
CA $472
Roundtrip
found 15 hours ago
Select Air Canada flight, departing Sun, Sep 6 from Edmonton to Boise, returning Sat, Sep 26, priced at CA $472 found 15 hours ago
WestJet
Tue, Jul 28 - Wed, Jul 29
YYZ
Toronto
BOI
Boise
CA $498 Roundtrip, found 15 hours ago
CA $498
Roundtrip
found 15 hours ago
Select WestJet flight, departing Tue, Jul 28 from Toronto to Boise, returning Wed, Jul 29, priced at CA $498 found 15 hours ago

Frequently asked questions

How do I find cheap flights to Southwest Idaho that have flexible change policies?
Search for affordable flights to Southwest Idaho, then mark the "No change fee" box underneath the "Flexible change policies" heading. It's that easy. We understand that travel plans change and flexibility matters, so you can book with confidence with Expedia.
Which airlines fly to Southwest Idaho?
Wherever you're planning to head to in Southwest Idaho and whenever you'd like to set off, you'll find your perfect flight with one of these top airlines:

  • Alaska Airlines - 862 flights to or near Southwest Idaho each month, including 810 flights to Boise Airport (BOI) and 52 to Friedman Memorial Airport (SUN) per month.
  • United Airlines - 551 flights to or near Southwest Idaho each month, including 381 flights to Boise Airport (BOI) and 169 to Friedman Memorial Airport (SUN) per month.
  • Delta - 537 flights to or near Southwest Idaho each month, including 442 flights to Boise Airport (BOI) and 95 to Friedman Memorial Airport (SUN) per month.

How can I find cheap tickets to Southwest Idaho?
You'll always nab an amazing deal with Expedia, but our "flexible dates" search function makes it even easier. Enter your preferred travel date, then tick the flexible dates box above to see prices for nearby days. CA $219 was the lowest price for a flight to Southwest Idaho in the last seven days.
How much is a flight to Southwest Idaho?
One-way flights departing from Seattle (SEA) sold for as low as CA $137 in the last seven days. During this time, the cost of a return air ticket to Southwest Idaho ranged between CA $219 and CA $498. If you find a fantastic deal, book fast — these prices don't stick around.
What are the most popular airports to fly into in Southwest Idaho?
Which of these Southwest Idaho airports you'll land at will mostly depend on your chosen airline and final destination in the region:

  • Boise Airport (BOI) - 2,232 flights per month.
  • Friedman Memorial Airport (SUN) - 317 flights per month.

When is the cheapest time to fly to Southwest Idaho?
Fly out on a Tuesday to improve your chances of scoring the cheapest flight to Southwest Idaho. Mondays are usually the next most affordable day to depart. Saturday is normally the most expensive day to fly anywhere.
How much is a plane ticket to Southwest Idaho?
In the last seven days, plane tickets ranged between CA $219 and CA $498. Browse through our amazing deals to Southwest Idaho, make a booking and then start packing!
What are the best things to do in Southwest Idaho?

  • Filled with atmosphere and culture, Boise is the ideal base for your Southwest Idaho vacation. Explore renowned attractions like Boise State University, hit the stores or eat and drink your way around some of this destination's fabulous eateries. What you choose to do is up to you!
  • When deciding what kind of clothing to take on your trip, bear in mind that Boise has a Mediterranean climate. To give you a clearer idea of what to expect when you're there, look up the weather forecast before you set off.
  • Approximately 24 kilometres to the west of Boise, Star also deserves a place on your itinerary. Top sights in this city include Helina Marie's Wine Shop — don't forget to check it out.

What is the best time to go to Southwest Idaho?
Almost anytime is an excellent time to visit Southwest Idaho, with wonderful cities like Boise to discover. If you like to move with the crowd, May, June and July are the most popular months for tourists. The summer season kicks off June 20 here. If you're visiting during this time, take some suncream and a wide-brimmed hat. Average summer temperatures range between 15ºC and 28ºC in Boise.
What months are the cheapest to book a flight to Southwest Idaho?
An inexpensive month to reserve a flight to Southwest Idaho is February, whereas prices are at a premium in December. Keep clear of this month if you're watching your pennies.

Travel information

Destination airport
Boise
Destination airport IATA code
BOI
Destination city name
Boise
Roundtrip price
CA $218

Trending flights to Southwest Idaho

Prices were available within the past 7 days and start at CA $137 for one-way flights and CA $219 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sun, Sep 6 - Sun, Sep 20
YEG
Edmonton
BOI
Boise
CA $399 Roundtrip, found 15 hours ago
CA $399
Roundtrip
found 15 hours ago
Select United flight, departing Sun, Sep 6 from Edmonton to Boise, returning Sun, Sep 20, priced at CA $399 found 15 hours ago

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