United Airlines will launch four new routes beginning August 11, 2026, including the first scheduled nonstop service between the United States and the Mexican state of Chiapas from Houston Intercontinental (IAH).

The carrier filed the four additions across its IAD, EWR, and IAH hubs for the fall and winter seasons. Two are year-round and two are seasonal, with frequencies ranging from daily to once-weekly.

• Washington Dulles (IAD) – Orange County/Santa Ana (SNA): year-round, daily, starting August 11, 2026.
• Washington Dulles (IAD) – Los Cabos (SJD): year-round, four times weekly (Monday, Thursday, Saturday, Sunday), starting October 25, 2026.
• Newark (EWR) – Christiansted, St. Croix (STX): seasonal, Saturday-only, October 31, 2026 – March 27, 2027.
• Houston (IAH) – Tuxtla Gutiérrez, Chiapas (TGZ): year-round, three times weekly (Wednesday, Friday, Sunday), starting October 28, 2026.

Why the Dulles additions matter

The IAD build-out is the most strategically loaded piece of the announcement. The SNA restart reopens a city pair United last operated nonstop in 1994, giving Washington-region travelers a Southern California option that bypasses Los Angeles International (LAX). With American Airlines having dropped plans to resume LAX–Dulles service, citing high oil prices, the slot opens a competitive gap.

Los Cabos returns to the Dulles map for the first time since 2018. It is a premium leisure market that fits United's pattern of adding warm-weather capacity where yields support the lift, even if East Coast travelers historically favor Cancún (CUN) and Puerto Vallarta (PVR) for Mexico-bound vacations.

A new country market from Houston

The IAH–TGZ link is the only U.S.–Chiapas nonstop at launch, a position United will hold unchallenged unless a competitor files. The carrier already serves 25 Mexican destinations from Houston, and Tuxtla Gutiérrez extends that network into southern Mexico near the Guatemalan border, a region anchored by Sumidero Canyon, San Cristóbal de las Casas, and the colonial cities that drive cultural tourism. Three weekly frequencies signal United is testing demand rather than committing widebody or daily capacity.

Newark gets St. Croix back

The EWR–STX return closes a 32-year absence on a winter-leisure, Saturday-only schedule running through late March 2027. St. Croix is a relatively small market: American Airlines operates year-round service from Miami (MIA), with seasonal additions from other hubs, and Delta runs seasonal service from Atlanta (ATL). United's once-weekly winter operation reflects the destination's seasonality rather than a full re-entry.

Network context

The four additions show United using its hub geography to defend point-of-sale in markets where competitors have stepped back. Dulles gets two of the four routes, reinforcing IAD as the carrier's primary East Coast international gateway against a retreating American. Houston absorbs the unique Mexico file, a role only IAH can credibly play given its southern position and existing Mexican network density. Newark takes a small leisure add that costs little but completes the Caribbean picture for the New York catchment.

What to watch

Whether the IAD–SNA daily schedule holds through the winter will be the first indicator of how durable the Orange County demand is without American pressure at LAX. Tuxtla Gutiérrez load factors in the first two quarters of operation will determine if the route moves from three-weekly to a daily or near-daily schedule, and whether other carriers seek to match it before the 2027 winter season opens.