United Flight UA4538 Deals & Information (2025/2026)

Wander Wisely with exceptional service, 24/7 supportOpens in a new window

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights

United Flight 4538 Route Deals From $204

The cheapest prices found with in the last 7 days for return flights were $202 and $204 for one-way flights to Philadelphia Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Aug 2 - Sun, Aug 3
IAD
Washington Dulles Intl.
PHL
Philadelphia Intl.
$202 Roundtrip, found 9 hours ago
$202
Roundtrip
found 9 hours ago
Select United flight, departing Sat, Aug 2 from Washington Dulles Intl. to Philadelphia Intl., returning Sun, Aug 3, priced at $202 found 9 hours ago
Sat, Aug 2 - Sun, Aug 3
IAD
Washington Dulles Intl.
PHL
Philadelphia Intl.
$237 Roundtrip, found 9 hours ago
$237
Roundtrip
found 9 hours ago
Select United flight, departing Sat, Aug 2 from Washington Dulles Intl. to Philadelphia Intl., returning Sun, Aug 3, priced at $237 found 9 hours ago
Thu, Jul 24 - Sat, Jul 26
IAD
Washington Dulles Intl.
PHL
Philadelphia Intl.
$251 Roundtrip, found 2 days ago
$251
Roundtrip
found 2 days ago
Select United flight, departing Thu, Jul 24 from Washington Dulles Intl. to Philadelphia Intl., returning Sat, Jul 26, priced at $251 found 2 days ago
Wed, Sep 10 - Tue, Sep 16
IAD
Washington Dulles Intl.
PHL
Philadelphia Intl.
$253 Roundtrip, found 5 days ago
$253
Roundtrip
found 5 days ago
Select United flight, departing Wed, Sep 10 from Washington Dulles Intl. to Philadelphia Intl., returning Tue, Sep 16, priced at $253 found 5 days ago
Sat, Aug 2 - Sun, Aug 3
IAD
Washington Dulles Intl.
PHL
Philadelphia Intl.
$262 Roundtrip, found 9 hours ago
$262
Roundtrip
found 9 hours ago
Select United flight, departing Sat, Aug 2 from Washington Dulles Intl. to Philadelphia Intl., returning Sun, Aug 3, priced at $262 found 9 hours ago
Tue, Sep 9 - Tue, Sep 16
IAD
Washington Dulles Intl.
PHL
Philadelphia Intl.
$263 Roundtrip, found 5 days ago
$263
Roundtrip
found 5 days ago
Select United flight, departing Tue, Sep 9 from Washington Dulles Intl. to Philadelphia Intl., returning Tue, Sep 16, priced at $263 found 5 days ago
Sat, Aug 2 - Sun, Aug 3
IAD
Washington Dulles Intl.
PHL
Philadelphia Intl.
$298 Roundtrip, found 9 hours ago
$298
Roundtrip
found 9 hours ago
Select United flight, departing Sat, Aug 2 from Washington Dulles Intl. to Philadelphia Intl., returning Sun, Aug 3, priced at $298 found 9 hours ago
Thu, Jul 24 - Sat, Jul 26
IAD
Washington Dulles Intl.
PHL
Philadelphia Intl.
$311 Roundtrip, found 2 days ago
$311
Roundtrip
found 2 days ago
Select United flight, departing Thu, Jul 24 from Washington Dulles Intl. to Philadelphia Intl., returning Sat, Jul 26, priced at $311 found 2 days ago
Sat, Aug 2 - Sun, Aug 3
IAD
Washington Dulles Intl.
PHL
Philadelphia Intl.
$328 Roundtrip, found 9 hours ago
$328
Roundtrip
found 9 hours ago
Select United flight, departing Sat, Aug 2 from Washington Dulles Intl. to Philadelphia Intl., returning Sun, Aug 3, priced at $328 found 9 hours ago
Sat, Aug 2 - Sun, Aug 3
IAD
Washington Dulles Intl.
PHL
Philadelphia Intl.
$333 Roundtrip, found 9 hours ago
$333
Roundtrip
found 9 hours ago
Select United flight, departing Sat, Aug 2 from Washington Dulles Intl. to Philadelphia Intl., returning Sun, Aug 3, priced at $333 found 9 hours ago
Sat, Oct 11 - Sun, Oct 12
IAD
Washington Dulles Intl.
PHL
Philadelphia Intl.
$337 Roundtrip, found 4 days ago
$337
Roundtrip
found 4 days ago
Select United flight, departing Sat, Oct 11 from Washington Dulles Intl. to Philadelphia Intl., returning Sun, Oct 12, priced at $337 found 4 days ago

Frequently asked questions

What route does flight number UA4538 take?
UA4538 takes several routes. The most frequently flown is between Charleston, SC Airport (CHS-Charleston Intl.) and IND, which is a direct flight. This flight typically takes 1 hour and 48 minutes. That said, there may possibly be other flights with this number that have one or more stops.
What kind of plane is on flight number UA4538?
There's a strong chance you'll be taking off on the Canadair (Bombardier) Regional Jet 550 if you're jetting from CHS to Indianapolis, IN Airport (IND-Indianapolis Intl.), one route used for flight number UA4538.
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 UA4538 flight with Travelocity, please visit our Customer Service Portal.