United Airlines (UA) operates 2218 nonstop routes to 402 destinations across 74 countries, departing from 393 airports. Its busiest bases by nonstop route count are Chicago (ORD), Denver (DEN) and Houston (IAH). United Airlines is a member of Star Alliance. Updated 18 October 2026.

Busiest United Airlines routes

San Francisco (SFO) → Palm Springs (PSP) Multiple daily
San Francisco (SFO) → Chicago (ORD) Multiple daily
Melbourne (MEL) → Los Angeles (LAX) Multiple daily
San Francisco (SFO) → Phoenix (PHX) Multiple daily
San Francisco (SFO) → Seattle (SEA) Multiple daily
Monterrey (MTY) → Houston (IAH) Multiple daily
San Francisco (SFO) → San Diego (SAN) Multiple daily
San Francisco (SFO) → Las Vegas (LAS) Multiple daily

Frequently asked questions

Where does United Airlines fly?

United Airlines (UA) flies nonstop to 402 destinations in 74 countries, with the most routes from Chicago (ORD), Denver (DEN) and Houston (IAH).

How many destinations does United Airlines fly to?

United Airlines operates 2218 nonstop routes serving 402 destinations across 74 countries.

What are United Airlines's main hubs?

United Airlines's busiest airports by nonstop route count are Chicago (ORD) (221 routes), Denver (DEN) (202 routes) and Houston (IAH) (180 routes).

Is United Airlines part of an airline alliance?

Yes — United Airlines is a member of Star Alliance.

Which routes does United Airlines fly most frequently?

United Airlines's most frequent nonstop routes are SFO–PSP (multiple daily), SFO–ORD (multiple daily), MEL–LAX (multiple daily), SFO–PHX (multiple daily) and SFO–SEA (multiple daily).

Cheap United Airlines nonstop deals

Where United Airlines flies nonstop

About United Airlines

Busiest United Airlines routes

Frequently asked questions

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