$215 Cheap Flights to Boulder

If you're searching for cheap flights to Boulder, consider traveling outside of peak season. Booking as early as possible is also likely to help you score savings. Or, fly on a different day — Thursday flights are on average 16% cheaper than Sunday departures.* Opt to receive flight price alerts on the Expedia app and you'll be notified as soon as fares fall.*Best day of the week to book, depart and ideal booking window recommendations based on average round-trip ticket prices for January through August 2023, sourced from Airline Reporting Corporation's (ARC) global airline sales database. Percentages noted are averages.

Lock in your flight to Boulder two to four months ahead if you're taking off from an international destination. For domestic travel, the timeframe is around 28 days in advance. Lower prices and a wider variety of travel dates, times and seating options are just a few of the benefits of booking early.**Best day of the week to book, depart and ideal booking window recommendations based on average round-trip ticket prices for January through August 2023, sourced from Airline Reporting Corporation's (ARC) global airline sales database. Percentages noted are averages.

Generally, you can find cheap flights to Boulder on a Sunday. Travelers can save around 8% on average compared to booking on a Friday, which is typically the most expensive day to buy tickets.**Best day of the week to book, depart and ideal booking window recommendations based on average round-trip ticket prices for January through August 2023, sourced from Airline Reporting Corporation's (ARC) global airline sales database. Percentages noted are averages.

A total of 4 carriers connect 1 airports around the world to Boulder. Here are a few of the major airlines to Boulder, where Kalgoorlie - Boulder Airport (KGI) is the major gateway:

• Virgin Australia
• Qantas
• Alliance Airlines
• Aviair Pty Ltd