Southwest just announced a new route to Mexico and more Red Eye flights over land

As well as an expansion in Seattle.

Southwest Airlines has announced major network plans for next summer, adding more than a dozen red-eye flights to its schedule and expanding popular domestic routes.

The airline has extended its booking schedule through next August, Southwest announced Wednesday. Beginning June 5, 2025, the airline will fly daily between these domestic cities, with a major expansion from Seattle:

• Austin (AUS) to/from Boston (BOS)

• Baltimore (BWI) to/from Portland, Oregon (PDX) and Seattle (SEA)

• Dallas (DAL) to/from Seattle (SEA)

• Denver to/from Myrtle Beach (MYR) and Savannah (SAV)

• Nashville to/from Seattle (SEA)

Additionally, Southwest will launch seasonal service from Colorado Springs (COS) to Cancun (CUN) next summer, marking the airport's first-ever international service. This new route will begin on June 7, 2025 and will operate once weekly on Saturdays.

2025 is set to be a big year for Southwest as the popular domestic airline introduces brand new seats on its upcoming Boeing 737-800 and 737 MAX-8 aircraft.

Additionally, the airline remains on track to launch its first Red Eye flights in February 2025 after announcing a “multi-year transition to 24-hour operations” earlier this year. Southwest unveiled over a dozen new flights overnight services scheduled to begin in early June:

• Honolulu (HNL) to Los Angeles (LAX)

• Lihue (LIH) to Las Vegas (LAS)

• Long Beach (LGB) to Baltimore (BWI)

• Ontario (ONT) to Baltimore (BWI)

• Portland, Ore. (PDX) to Baltimore (BWI)

• Sacramento (SMF) to Orlando (MCO)

• San Francisco (SFO) to Baltimore (BWI) and Nashville (BNA)

• San Jose (SJC) to Baltimore (BWI)

• Seattle (SEA) to Baltimore (BWI), Chicago (MDW), Houston (HOU) and Nashville (BNA)

In addition to the already announced flights from Hawaii to the US mainland, Southwest suggests that additional Red Eye services will be gradually added. While the decision to add red-eye was controversial among loyal Southwest fliers, the new flight times could be a time saver for those flying from western to eastern time zones.