United Flight 423 Deals & Information (2025/2026)

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Frequently asked questions

What route does flight number UA423 take?
UA423 is used on multiple routes. Mostly, UA423 flies directly from Portland Intl. Jetport to Dulles Intl. Airport. If that's your flight path, you'll be in the air for approximately 1 hour and 40 minutes.
What kind of plane is on flight number UA423?
If you've booked a seat on flight UA423 from Portland Intl. Jetport Airport (PWM) to Dulles Intl. Airport, there's a good chance you'll be on board an Airbus A319. This flight number serves numerous routes, but this is the most common one.
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 UA423 flight with Travelocity, please visit our Customer Service Portal.