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 until August next year, 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)

In addition, Southwest will introduce seasonal service to Cancun (CUN) from Colorado Springs (COS) next summer, which will be the airport’s first-ever international service. This new route starts on June 7, 2025 and runs once a week on Saturdays.

2025 will be a big year for Southwest as the popular domestic airline introduces brand new seating options on its new Boeing 737-800 and 737 MAX-8 aircraft.

Furthermore, following the announcement earlier this year of a “multi-year transformation to a 24-hour operation”, the airline remains on track to launch its first-ever red-eye flights in February 2025. Southwest has unveiled well over a dozen new night flights. services starting at the beginning of 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, OR (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 previously announced flights from Hawaii to the US mainland, Southwest suggests that more red-eye services will be added gradually. While the decision to add red-eye has been controversial among loyal Southwest flyers, the new flight times could save time for those flying from western to eastern time zones.