United Flight 1821 Deals & Information (2026/2027)

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United Flight 1821 Route Deals From $112

The cheapest prices found with in the last 7 days for return flights were $210 and $112 for one-way flights to LaGuardia for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Aug 22 - Wed, Aug 26
ORD
O'Hare Intl.
LGA
LaGuardia
$210 Roundtrip, found 2 hours ago
$210
Roundtrip
found 2 hours ago
Select United flight, departing Sat, Aug 22 from O'Hare Intl. to LaGuardia, returning Wed, Aug 26, priced at $210 found 2 hours ago
Mon, Aug 17 - Tue, Aug 18
ORD
O'Hare Intl.
LGA
LaGuardia
$218 Roundtrip, found 12 hours ago
$218
Roundtrip
found 12 hours ago
Select United flight, departing Mon, Aug 17 from O'Hare Intl. to LaGuardia, returning Tue, Aug 18, priced at $218 found 12 hours ago
Sat, Aug 22 - Wed, Aug 26
ORD
O'Hare Intl.
LGA
LaGuardia
$220 Roundtrip, found 2 hours ago
$220
Roundtrip
found 2 hours ago
Select United flight, departing Sat, Aug 22 from O'Hare Intl. to LaGuardia, returning Wed, Aug 26, priced at $220 found 2 hours ago
Fri, Aug 14 - Sat, Aug 15
ORD
O'Hare Intl.
LGA
LaGuardia
$221 Roundtrip, found 12 hours ago
$221
Roundtrip
found 12 hours ago
Select United flight, departing Fri, Aug 14 from O'Hare Intl. to LaGuardia, returning Sat, Aug 15, priced at $221 found 12 hours ago
Mon, Aug 17 - Tue, Aug 18
ORD
O'Hare Intl.
LGA
LaGuardia
$225 Roundtrip, found 12 hours ago
$225
Roundtrip
found 12 hours ago
Select United flight, departing Mon, Aug 17 from O'Hare Intl. to LaGuardia, returning Tue, Aug 18, priced at $225 found 12 hours ago
Sat, Aug 22 - Wed, Aug 26
ORD
O'Hare Intl.
LGA
LaGuardia
$225 Roundtrip, found 2 hours ago
$225
Roundtrip
found 2 hours ago
Select United flight, departing Sat, Aug 22 from O'Hare Intl. to LaGuardia, returning Wed, Aug 26, priced at $225 found 2 hours ago
Sun, Sep 6 - Tue, Sep 8
ORD
O'Hare Intl.
LGA
LaGuardia
$226 Roundtrip, found 22 hours ago
$226
Roundtrip
found 22 hours ago
Select United flight, departing Sun, Sep 6 from O'Hare Intl. to LaGuardia, returning Tue, Sep 8, priced at $226 found 22 hours ago
Thu, Aug 27 - Sat, Aug 29
ORD
O'Hare Intl.
LGA
LaGuardia
$229 Roundtrip, found 5 days ago
$229
Roundtrip
found 5 days ago
Select United flight, departing Thu, Aug 27 from O'Hare Intl. to LaGuardia, returning Sat, Aug 29, priced at $229 found 5 days ago
Fri, Oct 16 - Sat, Oct 17
ORD
O'Hare Intl.
LGA
LaGuardia
$229 Roundtrip, found 1 day ago
$229
Roundtrip
found 1 day ago
Select United flight, departing Fri, Oct 16 from O'Hare Intl. to LaGuardia, returning Sat, Oct 17, priced at $229 found 1 day ago
Mon, Aug 17 - Tue, Aug 18
ORD
O'Hare Intl.
LGA
LaGuardia
$231 Roundtrip, found 12 hours ago
$231
Roundtrip
found 12 hours ago
Select United flight, departing Mon, Aug 17 from O'Hare Intl. to LaGuardia, returning Tue, Aug 18, priced at $231 found 12 hours ago

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.