United Flight WN1521 Deals & Information (2025/2026)

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United Flight 1521 Route Deals From $67

The cheapest prices found with in the last 7 days for return flights were $108 and $67 for one-way flights to Hopkins Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Oct 4 - Mon, Oct 20
DEN
Denver Intl.
CLE
Hopkins Intl.
$108 Roundtrip, found 12 hours ago
$108
Roundtrip
found 12 hours ago
Select United flight, departing Sat, Oct 4 from Denver Intl. to Hopkins Intl., returning Mon, Oct 20, priced at $108 found 12 hours ago
Tue, Oct 7 - Tue, Oct 14
DEN
Denver Intl.
CLE
Hopkins Intl.
$135 Roundtrip, just found
$135
Roundtrip
just found
Select United flight, departing Tue, Oct 7 from Denver Intl. to Hopkins Intl., returning Tue, Oct 14, priced at $135 just found
Tue, Oct 7 - Tue, Oct 14
DEN
Denver Intl.
CLE
Hopkins Intl.
$148 Roundtrip, just found
$148
Roundtrip
just found
Select United flight, departing Tue, Oct 7 from Denver Intl. to Hopkins Intl., returning Tue, Oct 14, priced at $148 just found
Thu, Nov 13 - Tue, Nov 18
DEN
Denver Intl.
CLE
Hopkins Intl.
$149 Roundtrip, found 14 hours ago
$149
Roundtrip
found 14 hours ago
Select United flight, departing Thu, Nov 13 from Denver Intl. to Hopkins Intl., returning Tue, Nov 18, priced at $149 found 14 hours ago
Thu, Oct 2 - Sat, Oct 4
DEN
Denver Intl.
CLE
Hopkins Intl.
$163 Roundtrip, found 22 hours ago
$163
Roundtrip
found 22 hours ago
Select United flight, departing Thu, Oct 2 from Denver Intl. to Hopkins Intl., returning Sat, Oct 4, priced at $163 found 22 hours ago
Fri, Oct 3 - Sat, Oct 4
DEN
Denver Intl.
CLE
Hopkins Intl.
$164 Roundtrip, found 11 hours ago
$164
Roundtrip
found 11 hours ago
Select United flight, departing Fri, Oct 3 from Denver Intl. to Hopkins Intl., returning Sat, Oct 4, priced at $164 found 11 hours ago

Frequently asked questions

What route does flight number UA1521 take?
UA1521 jets between IAD and CLE directly. This trip takes 1 hour and 14 minutes.
How often is UA1521 on time?
United Airlines flight number UA1521 between IAD and Hopkins Intl. Airport (CLE) runs on schedule 91% of the time — so you can relax knowing that you will reach your destination ASAP. If your service is delayed, you're likely to wait approximately 44 minutes. This route has a star rating of 2.75.
What kind of plane is on flight number UA1521?
Get set to cruise the skies aboard a Boeing 737-800 if your flight number is UA1521. Almost all flights from Dulles Intl. Airport to CLE use this aircraft type.
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 UA1521 flight with Travelocity, please visit our Customer Service Portal.