United Flight 4576 Deals & Information (2026/2027)

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United Flight 4576 Route Deals From $289

The cheapest prices found with in the last 7 days for return flights were $334 and $289 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, May 22 - Mon, May 24
GSO
Piedmont Triad Intl.
ORD
O'Hare Intl.
$334 Roundtrip, found 3 days ago
$334
Roundtrip
found 3 days ago
Select United flight, departing Sat, May 22 from Piedmont Triad Intl. to O'Hare Intl., returning Mon, May 24, priced at $334 found 3 days ago
Tue, Dec 15 - Sun, Jan 17
GSO
Piedmont Triad Intl.
ORD
O'Hare Intl.
$358 Roundtrip, found 5 days ago
$358
Roundtrip
found 5 days ago
Select United flight, departing Tue, Dec 15 from Piedmont Triad Intl. to O'Hare Intl., returning Sun, Jan 17, priced at $358 found 5 days ago
Wed, Nov 11 - Sun, Nov 15
GSO
Piedmont Triad Intl.
ORD
O'Hare Intl.
$359 Roundtrip, found 6 days ago
$359
Roundtrip
found 6 days ago
Select United flight, departing Wed, Nov 11 from Piedmont Triad Intl. to O'Hare Intl., returning Sun, Nov 15, priced at $359 found 6 days ago
Sat, Dec 12 - Tue, Dec 29
GSO
Piedmont Triad Intl.
ORD
O'Hare Intl.
$367 Roundtrip, found 22 hours ago
$367
Roundtrip
found 22 hours ago
Select United flight, departing Sat, Dec 12 from Piedmont Triad Intl. to O'Hare Intl., returning Tue, Dec 29, priced at $367 found 22 hours ago
Wed, Nov 11 - Sun, Nov 15
GSO
Piedmont Triad Intl.
ORD
O'Hare Intl.
$369 Roundtrip, found 6 days ago
$369
Roundtrip
found 6 days ago
Select United flight, departing Wed, Nov 11 from Piedmont Triad Intl. to O'Hare Intl., returning Sun, Nov 15, priced at $369 found 6 days ago
Mon, Jan 4 - Sun, Jan 10
GSO
Piedmont Triad Intl.
ORD
O'Hare Intl.
$370 Roundtrip, found 6 days ago
$370
Roundtrip
found 6 days ago
Select United flight, departing Mon, Jan 4 from Piedmont Triad Intl. to O'Hare Intl., returning Sun, Jan 10, priced at $370 found 6 days ago
Thu, Dec 17 - Mon, Dec 21
GSO
Piedmont Triad Intl.
ORD
O'Hare Intl.
$372 Roundtrip, found 4 hours ago
$372
Roundtrip
found 4 hours ago
Select United flight, departing Thu, Dec 17 from Piedmont Triad Intl. to O'Hare Intl., returning Mon, Dec 21, priced at $372 found 4 hours ago
Fri, Dec 18 - Sat, Jan 2
GSO
Piedmont Triad Intl.
ORD
O'Hare Intl.
$377 Roundtrip, found 1 day ago
$377
Roundtrip
found 1 day ago
Select United flight, departing Fri, Dec 18 from Piedmont Triad Intl. to O'Hare Intl., returning Sat, Jan 2, priced at $377 found 1 day ago
Sat, Dec 26 - Wed, Dec 30
GSO
Piedmont Triad Intl.
ORD
O'Hare Intl.
$377 Roundtrip, found 5 days ago
$377
Roundtrip
found 5 days ago
Select United flight, departing Sat, Dec 26 from Piedmont Triad Intl. to O'Hare Intl., returning Wed, Dec 30, priced at $377 found 5 days ago
Wed, Dec 16 - Tue, Dec 29
GSO
Piedmont Triad Intl.
ORD
O'Hare Intl.
$380 Roundtrip, found 5 days ago
$380
Roundtrip
found 5 days ago
Select United flight, departing Wed, Dec 16 from Piedmont Triad Intl. to O'Hare Intl., returning Tue, Dec 29, priced at $380 found 5 days ago
Thu, Dec 17 - Mon, Dec 21
GSO
Piedmont Triad Intl.
ORD
O'Hare Intl.
$382 Roundtrip, found 4 hours ago
$382
Roundtrip
found 4 hours ago
Select United flight, departing Thu, Dec 17 from Piedmont Triad Intl. to O'Hare Intl., returning Mon, Dec 21, priced at $382 found 4 hours ago
Fri, May 14 - Fri, May 28
GSO
Piedmont Triad Intl.
ORD
O'Hare Intl.
$386 Roundtrip, found 1 day ago
$386
Roundtrip
found 1 day ago
Select United flight, departing Fri, May 14 from Piedmont Triad Intl. to O'Hare Intl., returning Fri, May 28, priced at $386 found 1 day ago
Sat, Dec 12 - Tue, Dec 29
GSO
Piedmont Triad Intl.
ORD
O'Hare Intl.
$387 Roundtrip, found 22 hours ago
$387
Roundtrip
found 22 hours ago
Select United flight, departing Sat, Dec 12 from Piedmont Triad Intl. to O'Hare Intl., returning Tue, Dec 29, priced at $387 found 22 hours ago

Frequently asked questions

What route does flight number UA4576 take?
Flight number UA4576 operates non-stop from ACK to Newark, NJ Airport (EWR-Liberty Intl.). During this trip, you'll be in the air for approximately 1 hour and 40 minutes. Consider booking ahead to lock in your favorite seat.
What kind of plane is on flight number UA4576?
There's every chance you'll be cruising aboard the Canadair (Bombardier) Regional Jet 550 if you have a seat on flight UA4576. Typically, this flight leaves from Nantucket, MA Airport (ACK-Nantucket Memorial) and comes in to land at EWR.
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 UA4576 flight with Travelocity, please visit our Customer Service Portal.