United Flight 4578 Deals & Information (2025/2026)

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United Flight 4578 Route Deals From $204

The cheapest prices found with in the last 7 days for return flights were $179 and $204 for one-way flights to Washington Dulles Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Nov 4 - Thu, Nov 13
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$179 Roundtrip, found 6 days ago
$179
Roundtrip
found 6 days ago
Select United flight, departing Tue, Nov 4 from Philadelphia Intl. to Washington Dulles Intl., returning Thu, Nov 13, priced at $179 found 6 days ago
Fri, Aug 8 - Sat, Aug 9
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$181 Roundtrip, found 6 days ago
$181
Roundtrip
found 6 days ago
Select United flight, departing Fri, Aug 8 from Philadelphia Intl. to Washington Dulles Intl., returning Sat, Aug 9, priced at $181 found 6 days ago
Fri, Aug 8 - Sun, Aug 10
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$186 Roundtrip, found 4 days ago
$186
Roundtrip
found 4 days ago
Select United flight, departing Fri, Aug 8 from Philadelphia Intl. to Washington Dulles Intl., returning Sun, Aug 10, priced at $186 found 4 days ago
Fri, Aug 8 - Sun, Aug 10
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$191 Roundtrip, found 4 days ago
$191
Roundtrip
found 4 days ago
Select United flight, departing Fri, Aug 8 from Philadelphia Intl. to Washington Dulles Intl., returning Sun, Aug 10, priced at $191 found 4 days ago
Tue, Nov 4 - Thu, Nov 13
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$208 Roundtrip, found 6 days ago
$208
Roundtrip
found 6 days ago
Select United flight, departing Tue, Nov 4 from Philadelphia Intl. to Washington Dulles Intl., returning Thu, Nov 13, priced at $208 found 6 days ago
Fri, Aug 8 - Sat, Aug 9
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$235 Roundtrip, found 6 days ago
$235
Roundtrip
found 6 days ago
Select United flight, departing Fri, Aug 8 from Philadelphia Intl. to Washington Dulles Intl., returning Sat, Aug 9, priced at $235 found 6 days ago
Tue, Nov 4 - Thu, Nov 13
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$239 Roundtrip, found 6 days ago
$239
Roundtrip
found 6 days ago
Select United flight, departing Tue, Nov 4 from Philadelphia Intl. to Washington Dulles Intl., returning Thu, Nov 13, priced at $239 found 6 days ago
Fri, Aug 8 - Sat, Aug 9
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$241 Roundtrip, found 6 days ago
$241
Roundtrip
found 6 days ago
Select United flight, departing Fri, Aug 8 from Philadelphia Intl. to Washington Dulles Intl., returning Sat, Aug 9, priced at $241 found 6 days ago
Fri, Aug 8 - Sun, Aug 10
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$246 Roundtrip, found 4 days ago
$246
Roundtrip
found 4 days ago
Select United flight, departing Fri, Aug 8 from Philadelphia Intl. to Washington Dulles Intl., returning Sun, Aug 10, priced at $246 found 4 days ago
Fri, Aug 8 - Sun, Aug 10
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$251 Roundtrip, found 4 days ago
$251
Roundtrip
found 4 days ago
Select United flight, departing Fri, Aug 8 from Philadelphia Intl. to Washington Dulles Intl., returning Sun, Aug 10, priced at $251 found 4 days 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.