U.S. low-cost carrier Southwest Airlines could introduce the long-awaited Boeing 737-7 into commercial service in early 2027, marking a new phase in its fleet renewal strategy. According to Aviation Week, company executives remain optimistic about an imminent regulatory breakthrough.
Speaking at the AeroEngines Americas conference, Fleet Asset Management Director Ken Barone said the airline expects regulatory approval for the aircraft type in the second half of this year. If that timeline holds, initial deliveries could begin in late 2026, allowing entry into revenue service in early 2027. Once certification is granted, Southwest anticipates a four- to six-month period to prepare the aircraft for operations, including training and technical integration.
The 737-7 program has faced years of delays compared to original expectations. Southwest had previously planned to operate 72 aircraft by 2023, but development and certification challenges pushed the schedule back. As reported by Aviation Week, 28 Boeing 737-7 aircraft have been produced so far, some of them before the 2020 downturn. Most are expected to be delivered to Southwest, although additional pre-delivery modifications will be required to meet the yet-to-be-finalized FAA-approved baseline configuration.
The introduction of the 737-7 plays a central role in the modernization of Southwest’s all-737 fleet, which totals around 800 aircraft. The largest subfleet is the 737-8 with 302 aircraft, alongside 301 older 737-700s and 197 737-800s. The 268 737-7s on order are intended to largely replace the aging 737-700 fleet.
This year, the airline plans to take delivery of 66 additional 737-8s while retiring 60 older aircraft. The arrival of the 737-7 will further accelerate fleet renewal and standardization. Southwest also intends to maintain certain operational features, including a left-seat head-up display (HUD), a system it has used since the mid-1990s. The airline will, however, need to secure its own operational approvals for integrating such equipment on the new variant.
If certification is indeed secured in the second half of 2026, the first revenue flights of the Boeing 737-7 in Southwest colors could take place in early 2027, closing one of the longer waiting chapters in the recent history of the 737 MAX program.
