$658 Cheap KLM flights Phoenix (PHX) to Belgrade (BEG)

Use the "Price (lowest to highest)" filter on Expedia to search for cheap KLM round-trip flights from $1,025 from PHX to BEG. Affordable one-way options from $658 are available as well.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Landing the best KLM deals from PHX to BEG often comes down to timing. You can save 17% on international flights when you book 18 to 29 days before takeoff instead of four to five months ahead. As an added bonus, you can pocket 17% on average by buying your tickets on a Sunday rather than a Friday, which is often the most expensive day to book.* It's a good idea to start checking out flights about one month before your travel dates.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.

Search KLM's earliest flights from PHX to BEG by selecting our "Morning" and "Early Morning" filters. Not only will you arrive sooner, early departures also experience 20% fewer cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.

A 4-star airline rating and the ability to collect points through KLM Flying Blue are the start of the reasons to leave from PHX to BEG with KLM. Plus, when you sign up to Expedia's free One Key™ program, you can earn OneKeyCash™* alongside KLM's loyalty program earnings. It's yours to spend on future bookings.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.