United Flight 1821 Deals & Information (2026/2027)

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United Flight 1821 Route Deals From $89

The cheapest prices found with in the last 7 days for return flights were $177 and $89 for one-way flights to LaGuardia for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Jul 9 - Sat, Jul 11
ORD
O'Hare Intl.
LGA
LaGuardia
$177 Roundtrip, found 5 hours ago
$177
Roundtrip
found 5 hours ago
Select United flight, departing Thu, Jul 9 from O'Hare Intl. to LaGuardia, returning Sat, Jul 11, priced at $177 found 5 hours ago
Thu, Jul 9 - Sat, Jul 11
ORD
O'Hare Intl.
LGA
LaGuardia
$187 Roundtrip, found 5 hours ago
$187
Roundtrip
found 5 hours ago
Select United flight, departing Thu, Jul 9 from O'Hare Intl. to LaGuardia, returning Sat, Jul 11, priced at $187 found 5 hours ago
Sat, Jun 20 - Sat, Jul 11
ORD
O'Hare Intl.
LGA
LaGuardia
$191 Roundtrip, found 15 hours ago
$191
Roundtrip
found 15 hours ago
Select United flight, departing Sat, Jun 20 from O'Hare Intl. to LaGuardia, returning Sat, Jul 11, priced at $191 found 15 hours ago
Tue, Jul 14 - Tue, Jul 21
ORD
O'Hare Intl.
LGA
LaGuardia
$196 Roundtrip, just found
$196
Roundtrip
just found
Select United flight, departing Tue, Jul 14 from O'Hare Intl. to LaGuardia, returning Tue, Jul 21, priced at $196 just found
Tue, Aug 18 - Wed, Sep 9
ORD
O'Hare Intl.
LGA
LaGuardia
$197 Roundtrip, found 1 day ago
$197
Roundtrip
found 1 day ago
Select United flight, departing Tue, Aug 18 from O'Hare Intl. to LaGuardia, returning Wed, Sep 9, priced at $197 found 1 day ago
Fri, May 29 - Mon, Jun 1
ORD
O'Hare Intl.
LGA
LaGuardia
$202 Roundtrip, found 13 hours ago
$202
Roundtrip
found 13 hours ago
Select United flight, departing Fri, May 29 from O'Hare Intl. to LaGuardia, returning Mon, Jun 1, priced at $202 found 13 hours ago
Fri, May 29 - Mon, Jun 1
ORD
O'Hare Intl.
LGA
LaGuardia
$203 Roundtrip, found 13 hours ago
$203
Roundtrip
found 13 hours ago
Select United flight, departing Fri, May 29 from O'Hare Intl. to LaGuardia, returning Mon, Jun 1, priced at $203 found 13 hours ago
Fri, May 29 - Mon, Jun 1
ORD
O'Hare Intl.
LGA
LaGuardia
$206 Roundtrip, found 13 hours ago
$206
Roundtrip
found 13 hours ago
Select United flight, departing Fri, May 29 from O'Hare Intl. to LaGuardia, returning Mon, Jun 1, priced at $206 found 13 hours ago
Wed, May 20 - Mon, Jun 1
ORD
O'Hare Intl.
LGA
LaGuardia
$218 Roundtrip, just found
$218
Roundtrip
just found
Select United flight, departing Wed, May 20 from O'Hare Intl. to LaGuardia, returning Mon, Jun 1, priced at $218 just found

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.