United Flight WN631 Deals & Information (2025/2026)

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United Flight 631 Route Deals From $89

The cheapest prices found with in the last 7 days for return flights were $177 and $89 for one-way flights to Denver Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Aug 23 - Thu, Aug 28
CLE
Hopkins Intl.
DEN
Denver Intl.
$177 Roundtrip, found 1 day ago
$177
Roundtrip
found 1 day ago
Select United flight, departing Sat, Aug 23 from Hopkins Intl. to Denver Intl., returning Thu, Aug 28, priced at $177 found 1 day ago

Frequently asked questions

What route does flight number UA631 take?
UA631 takes roughly 4 hours and 46 minutes to fly directly from Sky Harbor Intl. Airport (PHX) to Liberty Intl. Airport (EWR). We all know there's magic in the destination, but half the fun is in the journey!
How often is UA631 on time?
If you're traveling with United Airlines flight number UA631 from Phoenix, AZ Airport (PHX-Sky Harbor Intl.) to EWR, 84% of these services touch down as scheduled. On the rare occasion that there is a delay, expect a wait time of roughly 36 minutes on average. Thanks to this air carrier's top-quality service, this service has a 2.1-star rating.
What terminal does UA631 fly out of?
Flight number UA631 runs between PHX and EWR, and travelers with a seat on this flight typically depart from Terminal 3.
What kind of plane is on flight number UA631?
The Boeing 737-900 is the aircraft that's mostly used for flight number UA631. This flight nearly always leaves from Sky Harbor Intl. Airport (PHX) and touches down at Newark, NJ Airport (EWR-Liberty Intl.).
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 UA631 flight with Travelocity, please visit our Customer Service Portal.