United Flight UA4578 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 $182 and $204 for one-way flights to Washington Dulles Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Nov 26 - Thu, Nov 27
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$182 Roundtrip, found 5 days ago
$182
Roundtrip
found 5 days ago
Select United flight, departing Wed, Nov 26 from Philadelphia Intl. to Washington Dulles Intl., returning Thu, Nov 27, priced at $182 found 5 days ago
Thu, Oct 23 - Sun, Oct 26
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$194 Roundtrip, found 6 days ago
$194
Roundtrip
found 6 days ago
Select United flight, departing Thu, Oct 23 from Philadelphia Intl. to Washington Dulles Intl., returning Sun, Oct 26, priced at $194 found 6 days ago
Sat, Oct 18 - Sun, Oct 19
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$203 Roundtrip, found 21 hours ago
$203
Roundtrip
found 21 hours ago
Select United flight, departing Sat, Oct 18 from Philadelphia Intl. to Washington Dulles Intl., returning Sun, Oct 19, priced at $203 found 21 hours ago
Thu, Oct 9 - Sun, Oct 12
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$213 Roundtrip, found 2 days ago
$213
Roundtrip
found 2 days ago
Select United flight, departing Thu, Oct 9 from Philadelphia Intl. to Washington Dulles Intl., returning Sun, Oct 12, priced at $213 found 2 days ago
Thu, Oct 23 - Sun, Oct 26
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$214 Roundtrip, found 6 days ago
$214
Roundtrip
found 6 days ago
Select United flight, departing Thu, Oct 23 from Philadelphia Intl. to Washington Dulles Intl., returning Sun, Oct 26, priced at $214 found 6 days ago
Fri, Oct 17 - Sun, Oct 19
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$233 Roundtrip, found 3 days ago
$233
Roundtrip
found 3 days ago
Select United flight, departing Fri, Oct 17 from Philadelphia Intl. to Washington Dulles Intl., returning Sun, Oct 19, priced at $233 found 3 days ago
Wed, Nov 26 - Thu, Nov 27
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$243 Roundtrip, found 5 days ago
$243
Roundtrip
found 5 days ago
Select United flight, departing Wed, Nov 26 from Philadelphia Intl. to Washington Dulles Intl., returning Thu, Nov 27, priced at $243 found 5 days ago
Thu, Oct 23 - Sun, Oct 26
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$255 Roundtrip, found 6 days ago
$255
Roundtrip
found 6 days ago
Select United flight, departing Thu, Oct 23 from Philadelphia Intl. to Washington Dulles Intl., returning Sun, Oct 26, priced at $255 found 6 days ago
Thu, Oct 9 - Sun, Oct 12
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$263 Roundtrip, found 2 days ago
$263
Roundtrip
found 2 days ago
Select United flight, departing Thu, Oct 9 from Philadelphia Intl. to Washington Dulles Intl., returning Sun, Oct 12, priced at $263 found 2 days ago
Thu, Oct 9 - Sun, Oct 12
PHL
Philadelphia Intl.
IAD
Washington Dulles Intl.
$274 Roundtrip, found 2 days ago
$274
Roundtrip
found 2 days ago
Select United flight, departing Thu, Oct 9 from Philadelphia Intl. to Washington Dulles Intl., returning Sun, Oct 12, priced at $274 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.