$104 Cheap Frontier Airlines flights Miami (MIA) to Chicago (ORD)

Set the “Price (lowest to highest)” filter on Expedia to search for cheap Frontier Airlines return flights from $144 from MIA to ORD. Affordable one-way options from $104 are also on offer.**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 Chicago are generally cheaper in the quieter months of January and February. Whether you’re searching for a one-way or round-trip ticket, you could find a better deal then.

Search for cheap Frontier Airlines flights from Miami Intl. Airport (MIA) to O’Hare Intl. Airport (ORD) one to three months before your day of departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare class and journey, the best day of the week to book a domestic flight is usually Sunday and the most expensive day is typically Monday. Passengers who book on a Sunday can save 6% on average compared to those who book on a Monday.**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.

Simply enter your dates, click search and check “Nonstop” on Expedia to find any direct flights from MIA to ORD with Frontier Airlines or another airline.

Filter your results by “Early Morning” and “Morning” to see the earliest flights from MIA to ORD. Jetting off early means you’re 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.

O’Hare Intl. Airport (ORD) is the main Chicago hub for Frontier Airlines flights from Miami Intl. Airport (MIA).

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

Depending on your ticket type, a fee will generally apply if you cancel or change your flight more than 24 hours after confirmation. To secure flexible fares, select our “Changes included” or “No cancel fee” filter when searching for flights. For additional information on changing or canceling your reservation, go to “Trips,” select your flight and tick “Manage Booking.”