United Airlines has begun the process of replacing the fleet of Boeing 737-800 aircraft at its Guam base with the unveiling of the first of 10 new 737 MAX 8 jets.
On March 19, 2026, the first Boeing 737 MAX 8 jet joined United Airlines current 10 737-800s and two existing 737-8s at the Western Pacific US territory.
By the end of 2026, United Airlines expects to replace the entire Guam fleet with 737 MAX 8 aircraft.
The first regularly scheduled flights from Guam operating with the new 737 MAX 8 aircraft are to begin on April 30, 2026, on select services to Tokyo-Narita International Airport (NRT).
By the end of August 2026, all United flights from Guam to Tokyo-Narita will be operated with the 737 MAX aircraft.
This is United Airline’s Boeing 737-800 photographed in Tokyo Narita. This 737-800 is based in Guam and flies to other Asian routes such as Kaohsiung, Cebu and Manila. pic.twitter.com/oih8cK512U
— Charles Ryan (@CRyan787dash10) September 1, 2025
The aircraft is also scheduled to operate Tokyo-Narita to Ulaanbaatar (UBN) from April 30, 2026, and from Tokyo-Narita to Koror (ROR) from May 2, 2026.
By the end of August 2026, all United narrowbody flights from Tokyo-Narita will be operated with a 737 MAX 8 aircraft, as well as all flights from Saipan (SPN) and Yap (YAP).
By December 2026, United expects all of its narrowbody flights from Guam, including the Island Hopper service, to be operated with MAX 8 aircraft.
United’s Guam-based 737 MAX 8 aircraft will have a total of 164 seats, including up to 14 United First seats.
When required, the front rows of economy class can be collapsed to accommodate a medical stretcher for patients needing medevac transport.
“Guam has long played an important role in our Pacific network, both as a destination and for connecting communities across Micronesia with Asia and the continental United States,” said Patrick Quayle, Senior Vice President of Global Network Planning and Alliances at United Airlines. “The introduction of the Boeing 737 MAX 8 helps us deliver a more consistent and reliable experience for customers traveling to the 15 destinations we serve throughout the region.”