Oct. 02, 2026 • 4 min read Southwest unveils 11-route expansion across 15 cities for summer 2027 Facebook Twitter LinkedIn Copy URL Email The cards we feature here are from partners who compensate us when you are approved through our site, and this may impact how or where these products appear. We don’t cover all available credit cards, but our analysis, reviews, and opinions are entirely from our editorial team. Terms apply to the offers listed on this page. Please view our advertising policy and product review methodology for more information. Southwest Airlines is planning its biggest flight schedule ever for next summer, with a big focus in Austin, Nashville in San Diego.
The Dallas-based carrier on Friday announced an 11-route expansion that includes new service to Costa Rica, Turks and Caicos and the Bahamas.
Nine of the routes are flights Southwest has never offered before.
As part of its summer 2027 "route drop," the airline will link Austin Bergstrom International Airport (AUS) to three new destinations in the Caribbean and Central America.
AUS was the biggest winner overall, with a total of seven completely new or returning routes launching starting in June.
Elsewhere, Nashville International Airport (BNA) will get two new island destinations and a few additional domestic flights.
And San Diego International Airport (SAN) will land new service to the Deep South, along with a host of additional flights to cities it's already served.
Here's the rundown of the routes Southwest is launching and bringing back next summer.
This new service will run during the peak summer season between June 3 and Aug. 2, 2027.
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Austin to Guanacaste Airport (LIR) in Liberia, Costa Rica Weekend service Austin to Lynden Pindling International Airport (NAS) in Nassau, Bahamas Weekend service Austin to Punta Cana International Airport (PUJ) Weekend service Austin to Portland International Airport (PDX) Daily seasonal service; last flown in 2018 Austin to Sarasota Bradenton International Airport (SRQ) Seasonal Saturday service; last flown in 2023 Austin to Savannah/Hilton Head International Airport (SAV) Weekend service Austin to Bozeman Yellowstone Airport (BZN) Saturday service Nashville to Boise Airport (BOI) New route Nashville to Nassau New route Nashville to Howard Hamilton Providenciales Airport (PLS), Turks and Caicos New route San Diego to Will Rogers International Airport (OKC) in Oklahoma City Seasonal Sunday service Southwest on Friday also announced it would bring back seasonal service operated in 2026 from Nashville to Bozeman, Montana.
Ditto for its San Diego flights to Bozeman, Pittsburgh and Columbus, Ohio.
In Austin, Southwest expects to operate its largest-ever schedule next summer, with around 143 departures on peak days.
The carrier has gotten plenty of competition in the Texas capital of late, with Delta Air Lines quickly adding routes at an airport it's made one of its top focus cities . But Southwest remains the clear leader at AUS, still.
Meanwhile, Southwest is planning as many as 220 daily flights in Nashville next su…