United Flight UA4538 Deals & Information (2025/2026)

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United Flight 4538 Route Deals From $204

The cheapest prices found with in the last 7 days for return flights were $251 and $204 for one-way flights to Philadelphia Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

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
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
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, Oct 11 - Sun, Oct 12
IAD
Washington Dulles Intl.
PHL
Philadelphia Intl.
$337 Roundtrip, found 3 days ago
$337
Roundtrip
found 3 days ago
Select United flight, departing Sat, Oct 11 from Washington Dulles Intl. to Philadelphia Intl., returning Sun, Oct 12, priced at $337 found 3 days ago
Sat, Oct 11 - Sun, Oct 12
IAD
Washington Dulles Intl.
PHL
Philadelphia Intl.
$339 Roundtrip, found 3 days ago
$339
Roundtrip
found 3 days ago
Select United flight, departing Sat, Oct 11 from Washington Dulles Intl. to Philadelphia Intl., returning Sun, Oct 12, priced at $339 found 3 days ago
Sat, Oct 11 - Sun, Oct 12
IAD
Washington Dulles Intl.
PHL
Philadelphia Intl.
$355 Roundtrip, found 3 days ago
$355
Roundtrip
found 3 days ago
Select United flight, departing Sat, Oct 11 from Washington Dulles Intl. to Philadelphia Intl., returning Sun, Oct 12, priced at $355 found 3 days ago
Thu, Jul 24 - Sat, Jul 26
IAD
Washington Dulles Intl.
PHL
Philadelphia Intl.
$386 Roundtrip, found 2 days ago
$386
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 $386 found 2 days ago
Thu, Jul 24 - Sat, Jul 26
IAD
Washington Dulles Intl.
PHL
Philadelphia Intl.
$395 Roundtrip, found 2 days ago
$395
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 $395 found 2 days ago
Sat, Oct 11 - Sun, Oct 12
IAD
Washington Dulles Intl.
PHL
Philadelphia Intl.
$397 Roundtrip, found 3 days ago
$397
Roundtrip
found 3 days ago
Select United flight, departing Sat, Oct 11 from Washington Dulles Intl. to Philadelphia Intl., returning Sun, Oct 12, priced at $397 found 3 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.