United Flight 4566 Deals & Information (2026/2027)

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United Flight 4566 Route Deals From $166

The cheapest prices found with in the last 7 days for return flights were $189 and $166 for one-way flights to Washington Dulles Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, May 14 - Sun, May 17
PWM
Portland Intl. Jetport
IAD
Washington Dulles Intl.
$189 Roundtrip, found 5 hours ago
$189
Roundtrip
found 5 hours ago
Select United flight, departing Thu, May 14 from Portland Intl. Jetport to Washington Dulles Intl., returning Sun, May 17, priced at $189 found 5 hours ago
Thu, Apr 2 - Mon, Apr 6
PWM
Portland Intl. Jetport
IAD
Washington Dulles Intl.
$199 Roundtrip, found 5 days ago
$199
Roundtrip
found 5 days ago
Select United flight, departing Thu, Apr 2 from Portland Intl. Jetport to Washington Dulles Intl., returning Mon, Apr 6, priced at $199 found 5 days ago
Fri, Jan 23 - Mon, Jan 26
PWM
Portland Intl. Jetport
IAD
Washington Dulles Intl.
$204 Roundtrip, found 6 days ago
$204
Roundtrip
found 6 days ago
Select United flight, departing Fri, Jan 23 from Portland Intl. Jetport to Washington Dulles Intl., returning Mon, Jan 26, priced at $204 found 6 days ago
Thu, May 14 - Sun, May 17
PWM
Portland Intl. Jetport
IAD
Washington Dulles Intl.
$204 Roundtrip, found 5 hours ago
$204
Roundtrip
found 5 hours ago
Select United flight, departing Thu, May 14 from Portland Intl. Jetport to Washington Dulles Intl., returning Sun, May 17, priced at $204 found 5 hours ago
Fri, Jan 23 - Mon, Jan 26
PWM
Portland Intl. Jetport
IAD
Washington Dulles Intl.
$211 Roundtrip, found 6 days ago
$211
Roundtrip
found 6 days ago
Select United flight, departing Fri, Jan 23 from Portland Intl. Jetport to Washington Dulles Intl., returning Mon, Jan 26, priced at $211 found 6 days ago
Fri, Jan 23 - Mon, Jan 26
PWM
Portland Intl. Jetport
IAD
Washington Dulles Intl.
$217 Roundtrip, found 6 days ago
$217
Roundtrip
found 6 days ago
Select United flight, departing Fri, Jan 23 from Portland Intl. Jetport to Washington Dulles Intl., returning Mon, Jan 26, priced at $217 found 6 days ago
Fri, Jan 16 - Fri, Jan 23
PWM
Portland Intl. Jetport
IAD
Washington Dulles Intl.
$219 Roundtrip, found 4 days ago
$219
Roundtrip
found 4 days ago
Select United flight, departing Fri, Jan 16 from Portland Intl. Jetport to Washington Dulles Intl., returning Fri, Jan 23, priced at $219 found 4 days ago
Fri, Jan 16 - Sun, Jan 18
PWM
Portland Intl. Jetport
IAD
Washington Dulles Intl.
$225 Roundtrip, found 2 days ago
$225
Roundtrip
found 2 days ago
Select United flight, departing Fri, Jan 16 from Portland Intl. Jetport to Washington Dulles Intl., returning Sun, Jan 18, priced at $225 found 2 days ago
Fri, Jan 23 - Mon, Jan 26
PWM
Portland Intl. Jetport
IAD
Washington Dulles Intl.
$234 Roundtrip, found 6 days ago
$234
Roundtrip
found 6 days ago
Select United flight, departing Fri, Jan 23 from Portland Intl. Jetport to Washington Dulles Intl., returning Mon, Jan 26, priced at $234 found 6 days ago
Thu, Apr 2 - Mon, Apr 6
PWM
Portland Intl. Jetport
IAD
Washington Dulles Intl.
$240 Roundtrip, found 5 days ago
$240
Roundtrip
found 5 days ago
Select United flight, departing Thu, Apr 2 from Portland Intl. Jetport to Washington Dulles Intl., returning Mon, Apr 6, priced at $240 found 5 days ago

Frequently asked questions

What route does flight number UA4566 take?
Flight number UA4566 takes about 2 hours and 17 minutes to fly directly from Hilton Head Island Airport (HHH) to STL. We all know there's magic in the destination, but the journey is always half the fun!
What kind of plane is on flight number UA4566?
Get set to hop on board a Canadair (Bombardier) Regional Jet 550 if your flight number is UA4566. The majority of flights from Hilton Head Island Airport (HHH) to St. Louis, MO Airport (STL-Lambert-St. Louis Intl.) operate using this type of plane.
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 UA4566 flight with Travelocity, please visit our Customer Service Portal.