United Flight 4578 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 $186 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 8 - Sun, Aug 10
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$186 Roundtrip, found 5 days ago
$186
Roundtrip
found 5 days ago
Select United flight, departing Fri, Aug 8 from Philadelphia Intl. to Washington Dulles Intl., returning Sun, Aug 10, priced at $186 found 5 days ago
Fri, Aug 8 - Sun, Aug 10
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$191 Roundtrip, found 5 days ago
$191
Roundtrip
found 5 days ago
Select United flight, departing Fri, Aug 8 from Philadelphia Intl. to Washington Dulles Intl., returning Sun, Aug 10, priced at $191 found 5 days ago
Fri, Aug 8 - Sun, Aug 10
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$246 Roundtrip, found 5 days ago
$246
Roundtrip
found 5 days ago
Select United flight, departing Fri, Aug 8 from Philadelphia Intl. to Washington Dulles Intl., returning Sun, Aug 10, priced at $246 found 5 days ago
Fri, Aug 8 - Sun, Aug 10
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$251 Roundtrip, found 5 days ago
$251
Roundtrip
found 5 days ago
Select United flight, departing Fri, Aug 8 from Philadelphia Intl. to Washington Dulles Intl., returning Sun, Aug 10, priced at $251 found 5 days ago
Fri, Aug 8 - Sun, Aug 10
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$282 Roundtrip, found 5 days ago
$282
Roundtrip
found 5 days ago
Select United flight, departing Fri, Aug 8 from Philadelphia Intl. to Washington Dulles Intl., returning Sun, Aug 10, priced at $282 found 5 days ago
Fri, Aug 8 - Sun, Aug 10
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$287 Roundtrip, found 5 days ago
$287
Roundtrip
found 5 days ago
Select United flight, departing Fri, Aug 8 from Philadelphia Intl. to Washington Dulles Intl., returning Sun, Aug 10, priced at $287 found 5 days ago
Fri, Aug 8 - Sun, Aug 10
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$292 Roundtrip, found 5 days ago
$292
Roundtrip
found 5 days ago
Select United flight, departing Fri, Aug 8 from Philadelphia Intl. to Washington Dulles Intl., returning Sun, Aug 10, priced at $292 found 5 days ago
Fri, Aug 8 - Sun, Aug 10
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$317 Roundtrip, found 5 days ago
$317
Roundtrip
found 5 days ago
Select United flight, departing Fri, Aug 8 from Philadelphia Intl. to Washington Dulles Intl., returning Sun, Aug 10, priced at $317 found 5 days ago
Fri, Aug 8 - Sun, Aug 10
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$322 Roundtrip, found 5 days ago
$322
Roundtrip
found 5 days ago
Select United flight, departing Fri, Aug 8 from Philadelphia Intl. to Washington Dulles Intl., returning Sun, Aug 10, priced at $322 found 5 days ago
Wed, Aug 6 - Thu, Aug 7
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$537 Roundtrip, found 2 days ago
$537
Roundtrip
found 2 days ago
Select United flight, departing Wed, Aug 6 from Philadelphia Intl. to Washington Dulles Intl., returning Thu, Aug 7, priced at $537 found 2 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.