United Flight UA4578 Deals & Information (2025/2026)

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United Flight 4578 Route Deals From $210

The cheapest prices found with in the last 7 days for return flights were $225 and $210 for one-way flights to Washington Dulles Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Aug 22 - Sun, Aug 24
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$225 Roundtrip, found 1 day ago
$225
Roundtrip
found 1 day ago
Select United flight, departing Fri, Aug 22 from Philadelphia Intl. to Washington Dulles Intl., returning Sun, Aug 24, priced at $225 found 1 day ago
Fri, Aug 22 - Sun, Aug 24
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$327 Roundtrip, found 1 day ago
$327
Roundtrip
found 1 day ago
Select United flight, departing Fri, Aug 22 from Philadelphia Intl. to Washington Dulles Intl., returning Sun, Aug 24, priced at $327 found 1 day ago
Fri, Aug 22 - Sun, Aug 24
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$372 Roundtrip, found 1 day ago
$372
Roundtrip
found 1 day ago
Select United flight, departing Fri, Aug 22 from Philadelphia Intl. to Washington Dulles Intl., returning Sun, Aug 24, priced at $372 found 1 day ago
Fri, Aug 22 - Sun, Aug 24
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$388 Roundtrip, found 1 day ago
$388
Roundtrip
found 1 day ago
Select United flight, departing Fri, Aug 22 from Philadelphia Intl. to Washington Dulles Intl., returning Sun, Aug 24, priced at $388 found 1 day ago
Fri, Aug 22 - Sun, Aug 24
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$420 Roundtrip, found 1 day ago
$420
Roundtrip
found 1 day ago
Select United flight, departing Fri, Aug 22 from Philadelphia Intl. to Washington Dulles Intl., returning Sun, Aug 24, priced at $420 found 1 day ago
Fri, Aug 22 - Sun, Aug 24
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$435 Roundtrip, found 1 day ago
$435
Roundtrip
found 1 day ago
Select United flight, departing Fri, Aug 22 from Philadelphia Intl. to Washington Dulles Intl., returning Sun, Aug 24, priced at $435 found 1 day ago

Frequently asked questions

What route does flight number UA4578 take?
UA4578 takes a number of routes. The most frequently flown is Pensacola, FL Airport (PNS-Pensacola Intl.) to Hopkins Intl. Airport (CLE), which flies direct. This flight takes about 2 hours and 11 minutes. That said, you might find other flights with this number that have one or more stops.
What kind of plane is on flight number UA4578?
If you've booked a ticket on flight UA4578 from Pensacola Airport to Cleveland Hopkins Intl. Airport, there's an excellent chance you'll be heading off on a Canadair (Bombardier) Regional Jet 550. This flight number serves numerous routes, but this is the most popular.
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 UA4578 flight with Travelocity, please visit our Customer Service Portal.