United Flight 1821 Deals & Information (2026/2027)

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United Flight 1821 Route Deals From $95

The cheapest prices found with in the last 7 days for return flights were $187 and $95 for one-way flights to LaGuardia for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Sep 1 - Wed, Sep 2
ORD
O'Hare Intl.
LGA
LaGuardia
$187 Roundtrip, just found
$187
Roundtrip
just found
Select United flight, departing Tue, Sep 1 from O'Hare Intl. to LaGuardia, returning Wed, Sep 2, priced at $187 just found
Mon, Nov 2 - Tue, Nov 3
ORD
O'Hare Intl.
LGA
LaGuardia
$192 Roundtrip, found 11 hours ago
$192
Roundtrip
found 11 hours ago
Select United flight, departing Mon, Nov 2 from O'Hare Intl. to LaGuardia, returning Tue, Nov 3, priced at $192 found 11 hours ago
Tue, Sep 1 - Wed, Sep 2
ORD
O'Hare Intl.
LGA
LaGuardia
$197 Roundtrip, just found
$197
Roundtrip
just found
Select United flight, departing Tue, Sep 1 from O'Hare Intl. to LaGuardia, returning Wed, Sep 2, priced at $197 just found
Wed, Nov 4 - Sun, Nov 15
ORD
O'Hare Intl.
LGA
LaGuardia
$202 Roundtrip, found 3 hours ago
$202
Roundtrip
found 3 hours ago
Select United flight, departing Wed, Nov 4 from O'Hare Intl. to LaGuardia, returning Sun, Nov 15, priced at $202 found 3 hours ago
Thu, Nov 5 - Sat, Nov 7
ORD
O'Hare Intl.
LGA
LaGuardia
$206 Roundtrip, found 1 day ago
$206
Roundtrip
found 1 day ago
Select United flight, departing Thu, Nov 5 from O'Hare Intl. to LaGuardia, returning Sat, Nov 7, priced at $206 found 1 day ago
Thu, Sep 10 - Sun, Sep 13
ORD
O'Hare Intl.
LGA
LaGuardia
$207 Roundtrip, found 5 hours ago
$207
Roundtrip
found 5 hours ago
Select United flight, departing Thu, Sep 10 from O'Hare Intl. to LaGuardia, returning Sun, Sep 13, priced at $207 found 5 hours ago
Wed, Sep 2 - Mon, Sep 7
ORD
O'Hare Intl.
LGA
LaGuardia
$210 Roundtrip, found 5 days ago
$210
Roundtrip
found 5 days ago
Select United flight, departing Wed, Sep 2 from O'Hare Intl. to LaGuardia, returning Mon, Sep 7, priced at $210 found 5 days ago
Sat, Oct 10 - Tue, Oct 13
ORD
O'Hare Intl.
LGA
LaGuardia
$214 Roundtrip, just found
$214
Roundtrip
just found
Select United flight, departing Sat, Oct 10 from O'Hare Intl. to LaGuardia, returning Tue, Oct 13, priced at $214 just found
Wed, Sep 2 - Sat, Sep 5
ORD
O'Hare Intl.
LGA
LaGuardia
$215 Roundtrip, found 5 days ago
$215
Roundtrip
found 5 days ago
Select United flight, departing Wed, Sep 2 from O'Hare Intl. to LaGuardia, returning Sat, Sep 5, priced at $215 found 5 days ago
Thu, Nov 5 - Sat, Nov 7
ORD
O'Hare Intl.
LGA
LaGuardia
$216 Roundtrip, found 1 day ago
$216
Roundtrip
found 1 day ago
Select United flight, departing Thu, Nov 5 from O'Hare Intl. to LaGuardia, returning Sat, Nov 7, priced at $216 found 1 day 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.