The analysis, prepared by John Grant, Chief Analyst at OAG, notes that while the US aviation market has historically been viewed as mature, recent years have seen an increasing number of new international services launched by the three carriers, both on a year-round and seasonal basis.
Comparisons of the number of countries served show modest expansion since
2019 for Delta and United, while American Airlines currently operates to fewer
markets than previously. A comparison between this year’s schedules and the
summer 2025 programme shows United reducing its presence in three country
markets, while Delta and American are adding new destinations.
United’s reduction of three country markets reflects a number of factors.
Cuba continues to present political challenges for US carriers, while Sweden
has become more commercially complex following the entry of SAS into the SkyTeam alliance.
Delta’s new destinations combine seasonal and strategic opportunities.
Malta will operate as a summer-only service, two Caribbean destinations extend
winter programmes, and Saudi Arabia reflects plans for a future partnership
with Riyadh Air, subject to the airline launching services
in 2026.
American Airlines’ new routes are primarily leisure-driven. Services to the
Czech Republic and Hungary are scheduled as summer routes, while a new New Zealand
service consists of a single flight timed with the start of the winter
schedule.
The three airlines are also pursuing different long-term international
strategies influenced by aircraft deliveries and partnerships with global
carriers.
Since summer 2019, American Airlines has focused much of its international expansion on the Caribbean and Central America. The airline has added ten Caribbean destinations including Bridgetown, Tortola, and Anguilla. In Central America, frequencies to Mexico and Costa Rica have increased by 17 percent and 33 percent respectively.
The largest growth in American’s network has occurred at Dallas–Fort Worth,
where more than 1,500 additional flights have been added since 2019. Charlotte
and Austin Bergstrom have also gained new services to Central America.
American has also expanded European operations across several hub airports.
Philadelphia has recorded the largest growth, with increased frequencies to
Milan, Nice, Naples, and Copenhagen compared with Summer 2025.
For Delta Air Lines, Europe has remained the central focus of international
expansion since 2019, while frequencies in other global regions have declined.
The airline has added approximately nine additional daily flights across its
European network.
Delta has more than doubled frequencies to Italy after commercial
agreements with Alitalia ended, while services
to Germany have been reduced by approximately 25 percent as that market continues
to recover more slowly. This summer Delta will also increase operations to
Spain by 18 percent with the addition of a Boston–Madrid service alongside
existing routes from Atlanta and New York.
United Airlines has pursued a broader expansion strategy across multiple
international regions. Frequencies to Europe have increased by 36 percent,
supported by new seasonal services to Glasgow and Bari that focus on leisure
travel demand.
Despite ongoing adjustments to routes, Manchester is the only destination
that has not returned to United’s network since summer 2019, when it was served
daily from Newark.
United has also expanded operations to Africa and the Southwest Pacific.
Johannesburg now operates daily, Cape Town six times per week, and Lagos and
Accra operate year-round. In Australia, United operates more than 850 summer
flights from San Francisco and Los Angeles combined, serving Melbourne, Sydney,
and Brisbane.
A major factor behind United’s international expansion has been the growth
of its Boeing 787 fleet, which now exceeds 80 aircraft. The aircraft’s
operational efficiency has improved the economics of long-haul routes with
lower passenger volumes, allowing the airline to expand into markets that may
previously have been commercially challenging.
Industry analysis indicates that international networks for US carriers
will continue to evolve as travel demand shifts, leisure destinations rise and
fall in popularity, and geopolitical developments reshape aviation markets.
With substantial long-haul aircraft orders already placed by all three US
airlines, further international expansion across their networks is expected in
the coming years.
Tags: American Airlines, Delta Air Lines, John Grant, OAG
