United Flight AS312 Deals & Information (2025/2026)

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United Flight 312 Route Deals From $97

The cheapest prices found with in the last 7 days for return flights were $184 and $97 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Aug 30 - Sun, Aug 31
SEA
Seattle - Tacoma Intl.
ORD
O'Hare Intl.
$184 Roundtrip, found 1 day ago
$184
Roundtrip
found 1 day ago
Select United flight, departing Sat, Aug 30 from Seattle - Tacoma Intl. to O'Hare Intl., returning Sun, Aug 31, priced at $184 found 1 day ago
Wed, Aug 13 - Wed, Aug 20
SEA
Seattle - Tacoma Intl.
ORD
O'Hare Intl.
$214 Roundtrip, just found
$214
Roundtrip
just found
Select United flight, departing Wed, Aug 13 from Seattle - Tacoma Intl. to O'Hare Intl., returning Wed, Aug 20, priced at $214 just found

Frequently asked questions

What route does flight number UA312 take?
UA312 operates directly from Cancun Airport to Denver, CO Airport (DEN-Denver Intl.). During this journey, expect to be in the air for approximately 4 hours and 17 minutes. It pays to book ahead to lock in your favorite seat.
How often is UA312 on time?
If you've booked tickets on United Airlines flight number UA312 between Cancun, Quintana Roo Airport (CUN-Cancun Intl.) and DEN, 89% of these trips take off as scheduled. If your plane is delayed, your likely wait is roughly 8 minutes on average. Thanks to this air carrier's top-notch service, this flight has a star rating of 4.1.
What terminal does UA312 fly out of?
Travelers with tickets for flight number UA312 from Cancun, Quintana Roo Airport (CUN-Cancun Intl.) to DIA airport usually jet out of Terminal 3.
What kind of plane is on flight number UA312?
Get ready to hop on board a Boeing 737-900 if you've reserved a seat on flight UA312. Most flights from Cancun, Quintana Roo Airport (CUN-Cancun Intl.) to DEN use this aircraft model.
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 UA312 flight with Travelocity, please visit our Customer Service Portal.