United Flight 4242 Deals & Information (2026/2027)

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United Flight 4242 Route Deals From $204

The cheapest prices found with in the last 7 days for return flights were $256 and $204 for one-way flights to Philadelphia Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Jun 4 - Sun, Sep 13
IAD
Washington Dulles Intl.
PHL
Philadelphia Intl.
$256 Roundtrip, found 2 days ago
$256
Roundtrip
found 2 days ago
Select United flight, departing Thu, Jun 4 from Washington Dulles Intl. to Philadelphia Intl., returning Sun, Sep 13, priced at $256 found 2 days ago
Sat, Mar 14 - Sun, Mar 15
IAD
Washington Dulles Intl.
PHL
Philadelphia Intl.
$289 Roundtrip, found 2 days ago
$289
Roundtrip
found 2 days ago
Select United flight, departing Sat, Mar 14 from Washington Dulles Intl. to Philadelphia Intl., returning Sun, Mar 15, priced at $289 found 2 days ago
Thu, Jun 4 - Sun, Sep 13
IAD
Washington Dulles Intl.
PHL
Philadelphia Intl.
$291 Roundtrip, found 2 days ago
$291
Roundtrip
found 2 days ago
Select United flight, departing Thu, Jun 4 from Washington Dulles Intl. to Philadelphia Intl., returning Sun, Sep 13, priced at $291 found 2 days ago
Thu, Jun 4 - Sun, Sep 13
IAD
Washington Dulles Intl.
PHL
Philadelphia Intl.
$307 Roundtrip, found 2 days ago
$307
Roundtrip
found 2 days ago
Select United flight, departing Thu, Jun 4 from Washington Dulles Intl. to Philadelphia Intl., returning Sun, Sep 13, priced at $307 found 2 days ago
Thu, Jun 4 - Sun, Sep 13
IAD
Washington Dulles Intl.
PHL
Philadelphia Intl.
$316 Roundtrip, found 2 days ago
$316
Roundtrip
found 2 days ago
Select United flight, departing Thu, Jun 4 from Washington Dulles Intl. to Philadelphia Intl., returning Sun, Sep 13, priced at $316 found 2 days ago
Sat, Mar 14 - Sun, Mar 15
IAD
Washington Dulles Intl.
PHL
Philadelphia Intl.
$323 Roundtrip, found 2 days ago
$323
Roundtrip
found 2 days ago
Select United flight, departing Sat, Mar 14 from Washington Dulles Intl. to Philadelphia Intl., returning Sun, Mar 15, priced at $323 found 2 days ago
Thu, Jun 4 - Sun, Sep 13
IAD
Washington Dulles Intl.
PHL
Philadelphia Intl.
$341 Roundtrip, found 2 days ago
$341
Roundtrip
found 2 days ago
Select United flight, departing Thu, Jun 4 from Washington Dulles Intl. to Philadelphia Intl., returning Sun, Sep 13, priced at $341 found 2 days ago
Sat, Mar 14 - Sun, Mar 15
IAD
Washington Dulles Intl.
PHL
Philadelphia Intl.
$349 Roundtrip, found 2 days ago
$349
Roundtrip
found 2 days ago
Select United flight, departing Sat, Mar 14 from Washington Dulles Intl. to Philadelphia Intl., returning Sun, Mar 15, priced at $349 found 2 days ago
Thu, Jun 4 - Sun, Sep 13
IAD
Washington Dulles Intl.
PHL
Philadelphia Intl.
$351 Roundtrip, found 2 days ago
$351
Roundtrip
found 2 days ago
Select United flight, departing Thu, Jun 4 from Washington Dulles Intl. to Philadelphia Intl., returning Sun, Sep 13, priced at $351 found 2 days ago
Thu, Jun 4 - Sun, Sep 13
IAD
Washington Dulles Intl.
PHL
Philadelphia Intl.
$367 Roundtrip, found 2 days ago
$367
Roundtrip
found 2 days ago
Select United flight, departing Thu, Jun 4 from Washington Dulles Intl. to Philadelphia Intl., returning Sun, Sep 13, priced at $367 found 2 days ago