Cheap Frontier Airlines flights Chicago (MDW) to Harlingen (HRL)

You’ll find budget-friendly return Frontier Airlines flights from MDW to HRL by sorting your results from “Price (lowest to highest)” on Expedia. Or look for bargains for a one-way trip.**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.

January is one of the most affordable months to travel to Harlingen with Frontier Airlines. You could also find great prices on one-way and return fares in September.

Start searching one to three months before your departure to get cheaper fares on Frontier Airlines flights from Midway Intl. Airport (MDW) 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 cut 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 spot on, 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.

Use the “Nonstop” filter when searching for direct Frontier Airlines flights from MDW to HRL. You can also compare other airlines offering the same nonstop journey.

Sort your results by “Early Morning” and “Morning” to browse the earliest departures from MDW to HRL. Heading off early means you’re 20% less likely to experience 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.

Valley Intl. Airport (HRL) is the primary Harlingen gateway for Frontier Airlines flights from Midway Intl. Airport (MDW).

Travel from MDW to HRL with Frontier Airlines and look forward to a host of benefits starting with a rewarding loyalty program. When you book through Expedia as a Frontier Miles and One Key™ member, you could also earn OneKeyCash™* to redeem on select future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

You can usually modify or cancel your flight, although there may be additional fees if you made your booking over 24 hours ago. Prefer to keep your options open? Use Expedia’s “No cancel fee” and “Changes included” filters to find flights that won’t penalize you if you have to alter your plans. To make changes, go to “Trips,” select your flight and click on “Manage Booking” for further information.