United Flight UA1823 Deals & Information (2025/2026)

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United Flight 1823 Route Deals From $155

The cheapest prices found with in the last 7 days for return flights were $355 and $155 for one-way flights to San Francisco Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, May 25 - Thu, Jun 5
IAH
George Bush Intercontinental
SFO
San Francisco Intl.
$355 Roundtrip, found 4 hours ago
$355
Roundtrip
found 4 hours ago
Select United flight, departing Sun, May 25 from George Bush Intercontinental to San Francisco Intl., returning Thu, Jun 5, priced at $355 found 4 hours ago

Frequently asked questions

What route does flight number UA1823 take?
Flight number UA1823 flies directly from DEN to Sea-Tac Airport. During this journey, you can expect to be in the air for around 2 hours and 54 minutes. It’s wise to book ahead to secure your preferred seat.
How often is UA1823 on time?
Approximately 85% of UA1823 flights leave on time — so if you’re taking to the skies between DIA airport and Seattle, WA Airport (SEA-Seattle - Tacoma Intl.), you can breathe easy knowing that you will reach your destination as quickly as possible. On the odd occasion that your United Airlines journey runs behind time, you can expect a wait time of approximately 21 minutes. Thanks to the carrier’s high standard of service, this route has a 3.2-star rating.
What kind of plane is on flight number UA1823?
The Airbus A319 is the aircraft most commonly used for flight UA1823. More often than not, this flight heads off from Denver, CO Airport (DEN-Denver Intl.) and comes in to land at SEA.
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 UA1823 flight with Travelocity, please visit our Customer Service Portal.