United Flight 1521 Deals & Information (2026/2027)

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United Flight 1521 Route Deals From $264

The cheapest prices found with in the last 7 days for return flights were $289 and $264 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Aug 25 - Mon, Aug 31
PBI
Palm Beach Intl.
ORD
O'Hare Intl.
$289 Roundtrip, just found
$289
Roundtrip
just found
Select United flight, departing Tue, Aug 25 from Palm Beach Intl. to O'Hare Intl., returning Mon, Aug 31, priced at $289 just found
Thu, Jul 9 - Tue, Jul 14
PBI
Palm Beach Intl.
ORD
O'Hare Intl.
$295 Roundtrip, just found
$295
Roundtrip
just found
Select United flight, departing Thu, Jul 9 from Palm Beach Intl. to O'Hare Intl., returning Tue, Jul 14, priced at $295 just found
Fri, Jun 12 - Tue, Jun 23
PBI
Palm Beach Intl.
ORD
O'Hare Intl.
$296 Roundtrip, found 1 hour ago
$296
Roundtrip
found 1 hour ago
Select United flight, departing Fri, Jun 12 from Palm Beach Intl. to O'Hare Intl., returning Tue, Jun 23, priced at $296 found 1 hour ago
Fri, Jun 12 - Tue, Jun 23
PBI
Palm Beach Intl.
ORD
O'Hare Intl.
$301 Roundtrip, found 1 hour ago
$301
Roundtrip
found 1 hour ago
Select United flight, departing Fri, Jun 12 from Palm Beach Intl. to O'Hare Intl., returning Tue, Jun 23, priced at $301 found 1 hour ago
Thu, Jul 9 - Tue, Jul 14
PBI
Palm Beach Intl.
ORD
O'Hare Intl.
$304 Roundtrip, just found
$304
Roundtrip
just found
Select United flight, departing Thu, Jul 9 from Palm Beach Intl. to O'Hare Intl., returning Tue, Jul 14, priced at $304 just found
Thu, May 21 - Mon, May 25
PBI
Palm Beach Intl.
ORD
O'Hare Intl.
$310 Roundtrip, found 4 days ago
$310
Roundtrip
found 4 days ago
Select United flight, departing Thu, May 21 from Palm Beach Intl. to O'Hare Intl., returning Mon, May 25, priced at $310 found 4 days ago
Fri, Jun 12 - Mon, Jun 15
PBI
Palm Beach Intl.
ORD
O'Hare Intl.
$311 Roundtrip, found 2 days ago
$311
Roundtrip
found 2 days ago
Select United flight, departing Fri, Jun 12 from Palm Beach Intl. to O'Hare Intl., returning Mon, Jun 15, priced at $311 found 2 days ago
Wed, Jul 15 - Wed, Jul 22
PBI
Palm Beach Intl.
ORD
O'Hare Intl.
$312 Roundtrip, found 4 days ago
$312
Roundtrip
found 4 days ago
Select United flight, departing Wed, Jul 15 from Palm Beach Intl. to O'Hare Intl., returning Wed, Jul 22, priced at $312 found 4 days ago
Tue, Aug 25 - Mon, Aug 31
PBI
Palm Beach Intl.
ORD
O'Hare Intl.
$313 Roundtrip, just found
$313
Roundtrip
just found
Select United flight, departing Tue, Aug 25 from Palm Beach Intl. to O'Hare Intl., returning Mon, Aug 31, priced at $313 just found
Tue, Jul 21 - Tue, Aug 18
PBI
Palm Beach Intl.
ORD
O'Hare Intl.
$318 Roundtrip, found 2 days ago
$318
Roundtrip
found 2 days ago
Select United flight, departing Tue, Jul 21 from Palm Beach Intl. to O'Hare Intl., returning Tue, Aug 18, priced at $318 found 2 days ago
Tue, Aug 25 - Mon, Aug 31
PBI
Palm Beach Intl.
ORD
O'Hare Intl.
$320 Roundtrip, just found
$320
Roundtrip
just found
Select United flight, departing Tue, Aug 25 from Palm Beach Intl. to O'Hare Intl., returning Mon, Aug 31, priced at $320 just found
Sat, Jun 27 - Thu, Jul 2
PBI
Palm Beach Intl.
ORD
O'Hare Intl.
$320 Roundtrip, found 2 days ago
$320
Roundtrip
found 2 days ago
Select United flight, departing Sat, Jun 27 from Palm Beach Intl. to O'Hare Intl., returning Thu, Jul 2, priced at $320 found 2 days ago
Tue, May 19 - Tue, May 26
PBI
Palm Beach Intl.
ORD
O'Hare Intl.
$322 Roundtrip, just found
$322
Roundtrip
just found
Select United flight, departing Tue, May 19 from Palm Beach Intl. to O'Hare Intl., returning Tue, May 26, priced at $322 just found
Wed, Aug 5 - Sat, Aug 8
PBI
Palm Beach Intl.
ORD
O'Hare Intl.
$323 Roundtrip, found 1 day ago
$323
Roundtrip
found 1 day ago
Select United flight, departing Wed, Aug 5 from Palm Beach Intl. to O'Hare Intl., returning Sat, Aug 8, priced at $323 found 1 day ago
Wed, Jul 15 - Mon, Jul 20
PBI
Palm Beach Intl.
ORD
O'Hare Intl.
$324 Roundtrip, found 4 days ago
$324
Roundtrip
found 4 days ago
Select United flight, departing Wed, Jul 15 from Palm Beach Intl. to O'Hare Intl., returning Mon, Jul 20, priced at $324 found 4 days ago
Thu, Jul 9 - Tue, Jul 14
PBI
Palm Beach Intl.
ORD
O'Hare Intl.
$326 Roundtrip, just found
$326
Roundtrip
just found
Select United flight, departing Thu, Jul 9 from Palm Beach Intl. to O'Hare Intl., returning Tue, Jul 14, priced at $326 just found
Tue, May 19 - Tue, May 26
PBI
Palm Beach Intl.
ORD
O'Hare Intl.
$327 Roundtrip, just found
$327
Roundtrip
just found
Select United flight, departing Tue, May 19 from Palm Beach Intl. to O'Hare Intl., returning Tue, May 26, priced at $327 just found
Wed, Aug 5 - Sat, Aug 8
PBI
Palm Beach Intl.
ORD
O'Hare Intl.
$327 Roundtrip, found 1 day ago
$327
Roundtrip
found 1 day ago
Select United flight, departing Wed, Aug 5 from Palm Beach Intl. to O'Hare Intl., returning Sat, Aug 8, priced at $327 found 1 day 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.