United Flight UA1821 Deals & Information (2025/2026)

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United Flight 1821 Route Deals From $39

The cheapest prices found with in the last 7 days for return flights were and $39 for one-way flights to George Bush Intercontinental for the period specified. Prices and availability are subject to change. Additional terms apply.

Frequently asked questions

What route does flight number UA1821 take?
UA1821 takes roughly 2 hours and 42 minutes to fly directly from ORD to Denver, CO Airport (DEN-Denver Intl.). We all know there's magic in the destination, but the journey is always half the fun!
How often is UA1821 on time?
If you're flying with United Airlines flight number UA1821 from O'Hare Airport to DIA airport, it's comforting knowing that 86% of these journeys touch down on time. On the odd occasion that there's a delay, expect an average wait time of about 12 minutes. This service has a star rating of 4.
What terminal does UA1821 fly out of?
You'll likely be stepping aboard the plane at Terminal 1 if you're booked on flight UA1821 direct from O'Hare Airport to Denver, CO Airport (DEN-Denver Intl.).
What kind of plane is on flight number UA1821?
The Boeing 737 MAX 9 is the plane that's mostly used for flight number UA1821. Typically, this flight departs from Chicago, IL Airport (ORD-O'Hare Intl.) and comes in to land at Denver, CO Airport (DEN-Denver 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 UA1821 flight with Travelocity, please visit our Customer Service Portal.