United Flight 577 Deals & Information (2025/2026)

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United Flight 577 Route Deals From $240

The cheapest prices found with in the last 7 days for return flights were $234 and $240 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Dec 27 - Wed, Dec 31
PBI
Palm Beach Intl.
ORD
O'Hare Intl.
$234 Roundtrip, found 1 day ago
$234
Roundtrip
found 1 day ago
Select United flight, departing Sat, Dec 27 from Palm Beach Intl. to O'Hare Intl., returning Wed, Dec 31, priced at $234 found 1 day ago
Sat, Feb 28 - Mon, Mar 2
PBI
Palm Beach Intl.
ORD
O'Hare Intl.
$239 Roundtrip, just found
$239
Roundtrip
just found
Select United flight, departing Sat, Feb 28 from Palm Beach Intl. to O'Hare Intl., returning Mon, Mar 2, priced at $239 just found
Fri, Jan 9 - Mon, Jan 12
PBI
Palm Beach Intl.
ORD
O'Hare Intl.
$240 Roundtrip, found 10 hours ago
$240
Roundtrip
found 10 hours ago
Select United flight, departing Fri, Jan 9 from Palm Beach Intl. to O'Hare Intl., returning Mon, Jan 12, priced at $240 found 10 hours ago

Frequently asked questions

What route does flight number UA577 take?
UA577 travels from DEN to GEG directly. This service generally takes 2 hours and 24 minutes.
How often is UA577 on time?
Roughly 90% of UA577 flights arrive according to scheduled times — so if you're jetting from Denver, CO Airport (DEN-Denver Intl.) to GEG, you can be confident that you'll touch down at your destination ASAP. In the rare event that your United Airlines trip is delayed, you can expect to wait about 8 minutes. Because of the air carrier's top-notch service, this route has a star rating of 4.6.
What kind of plane is on flight number UA577?
The Boeing 737-800 is the kind of plane that's mostly used for flight number UA577. This flight almost always sets off from DEN and comes in to land at GEG.
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 UA577 flight with Travelocity, please visit our Customer Service Portal.