Cheap flights from Boise (BOI)

Idaho's busiest airport, gateway to the Treasure Valley

Boise Airport sits about 3 miles south of downtown Boise and is Idaho's largest commercial airport. Southwest and Alaska are the dominant carriers, with Delta, United, and American providing hub-feed service. Common nonstops include Seattle, Salt Lake City, Denver, Phoenix, Los Angeles, and Las Vegas. Allegiant and Frontier handle leisure routes to Florida and the Southwest.

Why search this airport on Flightmussy

Airlines flying from Boise (BOI)

Major carriers: Southwest Airlines, Alaska Airlines, Delta Air Lines, United Airlines, American Airlines. Low-cost carriers: Southwest Airlines, Allegiant Air, Frontier Airlines.

Popular destinations from Boise (BOI)

Frequently asked questions

Which airlines have nonstops from Boise?
Southwest and Alaska Airlines run the largest operations at BOI, with Delta, United, and American operating hub feeds to Salt Lake City, Denver, and Dallas-Fort Worth. Allegiant and Frontier add Florida and Las Vegas leisure routes. Flightmussy compares all carriers in one search, including LCC fares Google Flights often hides in default sorts.
When is the cheapest time to fly from Boise?
Mid-January through February and the post-Labor-Day weeks are the cheapest windows out of BOI. Ski-season demand inflates fares from late December through early March on routes to BOI rather than from it. Flightmussy's 12-month fare heatmap surfaces the cheapest week for your route automatically.
Are there direct flights from Boise to the East Coast?
BOI has limited East Coast nonstops; most itineraries to New York, Boston, or Washington connect via Salt Lake City, Denver, Minneapolis, or Chicago. Seasonal routes to Charleston and Reagan National have appeared on Allegiant and American. Flightmussy's full-year search compares all routing options for the cheapest total fare.
How far is Boise Airport from downtown?
BOI is about 3 miles south of downtown Boise, typically a 10-minute drive via Vista Avenue or I-84. ValleyRide's Route 3 connects the airport to downtown for a flat fare. Rideshare pickup is at the curbside on the lower level, and rental car counters are in the terminal's main hall.

Other airports in United States

Cheap flights and the cheapest month to fly, worldwide

About Flightmussy

Flightmussy is a free, independent flight search for travellers anywhere in the world. No signup, no ads, no tracking — email is optional, only for route price alerts. Compare fares across every airline and see 12 months of prices at a glance, including the low-cost carriers Google Flights often buries. Book directly with the airline or a trusted partner — we never add a markup.

Flight price data & research

Flightmussy runs its own 12-month forward fare scans across thousands of routes worldwide and publishes the data openly. Read the cheapest month to fly almost anywhere → — a global study of when fares are lowest — or browse the cheapest destinations from a city:

Popular routes

Popular long-haul routes

Popular regional routes

Browse by origin

Read the blog →