$89 Cheap United flights Boston (BOS) to Miami (MIA)

You’ll discover affordable round-trip United Airlines flights from $143 from BOS to MIA by sorting your results from “Price (lowest to highest)” on Expedia. Or look for deals from $89 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.

September is one of the least expensive months to jet off to Miami with United Airlines. You could also find fantastic deals on one-way and round-trip fares in October.

Search for cheap United Airlines flights from Logan Intl. Airport (BOS) to Miami Intl. Airport (MIA) one to three months prior to your 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 type and itinerary, the ideal day 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 their travel 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.

Enter your dates, click search and select “Nonstop” on Expedia to browse any direct flights from BOS to MIA with United Airlines or other carriers.

To find the earliest departures from BOS to MIA with United Airlines, filter your results by “Morning” and “Early Morning.” Choosing an early flight usually 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.

United Airlines flights from Logan Intl. Airport (BOS) to Miami touch down at Miami Intl. Airport (MIA). This is the main entry point to this destination.

Depart from BOS to MIA with United Airlines and you can look forward to a host of benefits including a rewarding loyalty program. When booking through Expedia as a United Mileage Plus and One Key™ member, you can 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 additional charges may apply if your booking was made more than 24 hours ago. Need flexible options? Make use of Expedia’s “No cancel fee” and “Changes included” filters to find flights that won’t penalize you if you need to alter your plans. To make modifications, go to “Trips,” select your flight and click on “Manage Booking” for more information.