United Flight 5642 Deals & Information (2025/2026)

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

Change your flight without a fee on select flights

United Flight 5642 Route Deals From $205

The cheapest prices found with in the last 7 days for return flights were $172 and $205 for one-way flights to Denver Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Frequently asked questions

What route does flight number UA5642 take?
UA5642 takes 1 hour and 59 minutes to jet directly from San Francisco Airport to Phoenix Sky Harbor Intl. Airport. Sure, there's magic in the destination, but the journey is always half the fun!
How often is UA5642 on time?
United Airlines flight number UA5642 between San Francisco Intl. Airport (SFO) and Sky Harbor Intl. Airport (PHX) operates on time 97% of the time — so you can be confident you will arrive at your destination ASAP. If this service happens to be late, you'll probably wait approximately 14 minutes. This route has a 4.15-star rating.
What terminal does UA5642 fly out of?
You'll likely be boarding the plane from Terminal 3 if you're traveling on UA5642 direct from San Francisco Intl. Airport (SFO) to Sky Harbor Intl. Airport (PHX).
What kind of plane is on flight number UA5642?
Get set to jump on board an Embraer 175 if you've reserved a seat on flight UA5642. Almost all flights from San Francisco Airport to Phoenix, AZ Airport (PHX-Sky Harbor Intl.) operate using this type of plane.
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 UA5642 flight with Travelocity, please visit our Customer Service Portal.