Southwest Will Launch Seasonal Boise to Nashville Flights

The carrier will begin offering weekly nonstop service between the cities starting on June 5, 2027.

Updated on Oct. 6, 2026 in Air Travel

Bold vector editorial illustration showing a jet silhouette ascending against a clear, expansive sky, representing a new travel route. — Southwest Airlines will launch a new seasonal nonstop flight route between Boise and Nashville starting June 5, 2027. AI Illustration. Upload story photo >

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Should local airports prioritize adding new nonstop flight destinations for residents?

Southwest Airlines is set to introduce a seasonal nonstop flight from Boise Airport to Nashville International Airport beginning June 5, 2027. This new route will operate once weekly on Saturdays through July 31, 2027.

Why it matters

This seasonal addition expands travel options for Boise residents looking for direct access to Tennessee, marking a return of nonstop service to Nashville after a multi-year hiatus.

Boise Airport currently hosts eight different airlines and provides nonstop service to 30 destinations. Travelers departing from the facility also have access to one-stop connections reaching over 350 global cities.

The players

Southwest Airlines

A major American airline known for its low-cost carrier model and point-to-point network strategy.

Boise Airport

The primary commercial aviation hub for the Boise metropolitan area and southwestern Idaho.

Nashville International Airport

A major public international airport located in Nashville, Tennessee, serving the Nashville metropolitan area.

Allegiant Air

An American ultra-low-cost airline that operates scheduled and charter flights to various leisure destinations.

The details

Southwest Airlines will utilize its fleet to service the new Saturday-only route, providing a direct link between the two cities for the summer season. This flight represents a return to this specific service corridor, which was previously operated by Allegiant Air during 2021.

Allegiant Air offered Boise to Nashville nonstop service in summer 2021.
Alaska Airlines begins Boise to Honolulu service on Dec. 17, 2026.
Alaska Airlines ends Honolulu service on March 21, 2027.
Southwest Airlines begins Nashville service on June 5, 2027.
Southwest Airlines ends Nashville service on July 31, 2027.

Travel Outlook

This seasonal service aligns with the ongoing expansion of route networks at Boise Airport, which currently offers nonstop flights to 30 destinations. The route follows a pattern of seasonal adjustments typical for regional hubs navigating fluctuating summer travel demand.

Travelers looking to utilize this direct connection should mark their calendars for the service window between June 5 and July 31, 2027. Because the flight is limited to a weekly Saturday schedule, booking early is recommended to secure seats on these specific seasonal dates.

The takeaway

Seasonal route additions like this provide travelers with more direct connectivity during high-demand summer months. Residents should review the specific Saturday-only schedule when coordinating vacation plans to Nashville.