United Airlines operates one of the world's largest networks, with eight U.S. hubs connecting you to over 340 destinations across the globe. As a founding Star Alliance member, United offers strong international coverage and MileagePlus — one of the most widely used frequent flyer programs in the U.S. Whether you're flying coast-to-coast or across the Pacific, FaresMatch advisors compare United fares daily to help you find the lowest available price.
Trending United Airlines fares
One-way starting prices on popular United routes. Search above for live availability.
ChicagoShoulder seasonSFO → ORDSan Francisco – Chicago- Flight time
- 4h nonstop
- Airlines
- United
$89
DenverMidweek dealLAX → DENLos Angeles – Denver- Flight time
- 2h 30m nonstop
- Airlines
- United
$79
MiamiFall travelEWR → MIANewark – Miami- Flight time
- 3h nonstop
- Airlines
- United
$89
HawaiiBook earlySFO → HNLSan Francisco – Honolulu- Flight time
- 5h 30m nonstop
- Airlines
- United
$249
LondonSpring travelIAD → LHRWashington Dulles – London- Flight time
- 7h 30m nonstop
- Airlines
- United
$330
TokyoBook earlyORD → NRTChicago – Tokyo Narita- Flight time
- 13h nonstop
- Airlines
- United
$480
Popular United Airlines routes
Los Angeles to San Francisco
SFO ↔ ORD San Francisco to Chicago
United's busiest transcontinental route connecting its two major hubs with frequent daily nonstops.
EWR → LHR Newark to London Heathrow
United's flagship transatlantic route — multiple daily nonstops from Newark to London.
SFO → NRT San Francisco to Tokyo
Major Pacific route operated with Star Alliance partner ANA.
IAH → MEX Houston to Mexico City
United's Latin America gateway with strong Mexico coverage from its Houston hub.
ORD → DEN Chicago to Denver
Busy midcontinent route between United's O'Hare and Denver hubs.
LAX → SFO Los Angeles to San Francisco
Short West Coast shuttle route with high frequency between United's California hubs.
Tips for finding cheap United flights
United domestic fares tend to be most competitive 3 to 6 weeks before departure. For international routes, booking 2 to 4 months ahead usually finds the best prices.
United's Basic Economy is the lowest fare but restricts seat selection and doesn't allow changes. It's only a good option if you're certain of your travel dates and are packing light.
Tuesdays and Wednesdays consistently show the cheapest fares on United's domestic network. Avoid Friday and Sunday, which peak with business and leisure demand.
United's MileagePlus partners with over 40 Star Alliance carriers. If you have miles, premium routes on Lufthansa, Singapore Airlines, or ANA can be excellent value redemptions.
Frequently asked questions
How many hubs does United Airlines have?
United operates eight U.S. hubs: Chicago O'Hare (ORD), Newark (EWR), San Francisco (SFO), Houston Intercontinental (IAH), Denver (DEN), Los Angeles (LAX), Washington Dulles (IAD), and Guam (GUM).
What is United's MileagePlus program?
MileagePlus is United's frequent flyer program. Members earn miles on United and Star Alliance partners and can redeem them for flights, upgrades, and partner rewards. Premier status tiers — Silver, Gold, Platinum, and 1K — unlock complimentary upgrades, bonus miles, and waived bag fees.
Does United Airlines charge for checked bags?
United allows a personal item and carry-on bag free in most fare classes. Checked bags start at $35 for the first bag on domestic routes. MileagePlus credit card holders and Premier status members receive complimentary checked bags depending on their tier.
What cabin classes does United offer?
United offers Basic Economy, Economy, Economy Plus (extra legroom), First Class (domestic), Premium Plus (international premium economy), and United Polaris (international business class with lie-flat seats). Cabin options vary by route and aircraft type.
Find the cheapest United Airlines fare
A FaresMatch advisor will compare United fares — including unpublished rates — with all other available options on your route to lock in the best price.