United Flight UA539 Deals & Information (2024/2025)

Wander Wisely with exceptional service, 24/7 supportOpens in a new window

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights

United Flight 539 Route Deals From $89

The cheapest prices found with in the last 7 days for return flights were $110 and $89 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Dec 18 - Thu, Dec 19
PHL
Philadelphia Intl.
ORD
O'Hare Intl.
$110 Roundtrip, found 12 hours ago
$110
Roundtrip
found 12 hours ago
Select United flight, departing Wed, Dec 18 from Philadelphia Intl. to O'Hare Intl., returning Thu, Dec 19, priced at $110 found 12 hours ago
Tue, Jan 21 - Tue, Jan 28
PHL
Philadelphia Intl.
ORD
O'Hare Intl.
$137 Roundtrip, found 4 days ago
$137
Roundtrip
found 4 days ago
Select United flight, departing Tue, Jan 21 from Philadelphia Intl. to O'Hare Intl., returning Tue, Jan 28, priced at $137 found 4 days ago
Wed, Dec 18 - Thu, Dec 19
PHL
Philadelphia Intl.
ORD
O'Hare Intl.
$142 Roundtrip, found 12 hours ago
$142
Roundtrip
found 12 hours ago
Select United flight, departing Wed, Dec 18 from Philadelphia Intl. to O'Hare Intl., returning Thu, Dec 19, priced at $142 found 12 hours ago

Frequently asked questions

What route does flight number UA539 take?
UA539 serves multiple routes, but the most common is between San Francisco Intl. Airport (SFO) and Kahului Airport. If you manage to score a direct flight, you’ll disembark the plane in approximately 5 hours and 25 minutes. Multi-stop flights can also travel under this number, as can flights on other routes.
What terminal does UA539 fly out of?
You’ll likely board the plane from Terminal 3 if you’re booked on a flight out of San Francisco, CA Airport (SFO-San Francisco Intl.). UA539 serves a number of different routes, but the direct flight between San Francisco, CA Airport (SFO-San Francisco Intl.) and Kahului, HI Airport (OGG) is the most frequently traveled.
What kind of plane is on flight number UA539?
UA539 is a flight number that serves many different routes. If you’re booked on the most common route, San Francisco, CA Airport (SFO-San Francisco Intl.) to Kahului, HI Airport (OGG), you’ll likely be climbing aboard a Boeing 737-800.
If I am not able to travel due to COVID-19, can I change my flight to a later date?
For more info about changing your UA539 flight with Travelocity, please visit our Customer Service Portal.