Cheap Frontier Airlines flights Phoenix (PHX) to Harlingen (HRL)

Use the “Price (lowest to highest)” filter on Expedia to find cheap Frontier Airlines round-trip flights from PHX to HRL. Affordable one-way tickets are available too.**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.

Frontier Airlines flights to Harlingen are usually cheaper in the low-season months of January and September. Whether you need a return or one-way ticket, you could land a better deal then.

Begin your search one to three months before your departure to find cheap fares on Frontier Airlines flights from Sky Harbor Intl. Airport (PHX) to Valley Intl. Airport (HRL). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also reduce costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Get your timing right, and you can enjoy significant savings on domestic trips.*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.

Fill in your dates, press search and check the “Nonstop” filter on Expedia to find any direct flights from PHX to HRL with Frontier Airlines or another airline.

To find the earliest departure from PHX to HRL with Frontier Airlines, sort your results by “Early Morning” and “Morning.” Choosing an early flight generally means cancellations are less likely.**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.

Valley Intl. Airport (HRL) is the main Harlingen gateway for Frontier Airlines flights from Sky Harbor Intl. Airport (PHX).

Offering a rewarding loyalty program, Frontier Airlines is a top choice for many travelers flying from PHX to HRL. Plus, as a Frontier Miles and One Key™ member booking through Expedia, you can earn OneKeyCash™* on eligible flights on top of your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Changes are usually free within 24 hours of making a booking, but your airline may charge a fee after that. For further information about altering your flights, check out your “Trips,” select your flight and click on “Manage Booking.” If you’d like the flexibility to adjust your plans without additional costs, tick the “Changes included” and “No cancel fee” filters when organizing your next escape.