United Flight 3699 Deals & Information (2025/2026)

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United Flight 3699 Route Deals From $126

The cheapest prices found with in the last 7 days for return flights were $189 and $126 for one-way flights to Washington Dulles Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Aug 21 - Mon, Aug 25
PWM
Portland Intl. Jetport
IAD
Washington Dulles Intl.
$189 Roundtrip, found 8 hours ago
$189
Roundtrip
found 8 hours ago
Select United flight, departing Thu, Aug 21 from Portland Intl. Jetport to Washington Dulles Intl., returning Mon, Aug 25, priced at $189 found 8 hours ago
Thu, Jul 17 - Mon, Jul 21
PWM
Portland Intl. Jetport
IAD
Washington Dulles Intl.
$193 Roundtrip, found 8 hours ago
$193
Roundtrip
found 8 hours ago
Select United flight, departing Thu, Jul 17 from Portland Intl. Jetport to Washington Dulles Intl., returning Mon, Jul 21, priced at $193 found 8 hours ago
Fri, Jul 11 - Mon, Jul 14
PWM
Portland Intl. Jetport
IAD
Washington Dulles Intl.
$193 Roundtrip, found 1 day ago
$193
Roundtrip
found 1 day ago
Select United flight, departing Fri, Jul 11 from Portland Intl. Jetport to Washington Dulles Intl., returning Mon, Jul 14, priced at $193 found 1 day ago
Thu, Aug 21 - Mon, Aug 25
PWM
Portland Intl. Jetport
IAD
Washington Dulles Intl.
$194 Roundtrip, found 8 hours ago
$194
Roundtrip
found 8 hours ago
Select United flight, departing Thu, Aug 21 from Portland Intl. Jetport to Washington Dulles Intl., returning Mon, Aug 25, priced at $194 found 8 hours ago
Thu, Aug 21 - Mon, Aug 25
PWM
Portland Intl. Jetport
IAD
Washington Dulles Intl.
$199 Roundtrip, found 8 hours ago
$199
Roundtrip
found 8 hours ago
Select United flight, departing Thu, Aug 21 from Portland Intl. Jetport to Washington Dulles Intl., returning Mon, Aug 25, priced at $199 found 8 hours ago
Fri, Jul 11 - Mon, Jul 14
PWM
Portland Intl. Jetport
IAD
Washington Dulles Intl.
$203 Roundtrip, found 1 day ago
$203
Roundtrip
found 1 day ago
Select United flight, departing Fri, Jul 11 from Portland Intl. Jetport to Washington Dulles Intl., returning Mon, Jul 14, priced at $203 found 1 day ago
Fri, Jul 4 - Mon, Jul 7
PWM
Portland Intl. Jetport
IAD
Washington Dulles Intl.
$203 Roundtrip, found 1 day ago
$203
Roundtrip
found 1 day ago
Select United flight, departing Fri, Jul 4 from Portland Intl. Jetport to Washington Dulles Intl., returning Mon, Jul 7, priced at $203 found 1 day ago
Thu, Aug 21 - Mon, Aug 25
PWM
Portland Intl. Jetport
IAD
Washington Dulles Intl.
$204 Roundtrip, found 8 hours ago
$204
Roundtrip
found 8 hours ago
Select United flight, departing Thu, Aug 21 from Portland Intl. Jetport to Washington Dulles Intl., returning Mon, Aug 25, priced at $204 found 8 hours ago
Fri, Sep 19 - Tue, Sep 30
PWM
Portland Intl. Jetport
IAD
Washington Dulles Intl.
$206 Roundtrip, found 13 hours ago
$206
Roundtrip
found 13 hours ago
Select United flight, departing Fri, Sep 19 from Portland Intl. Jetport to Washington Dulles Intl., returning Tue, Sep 30, priced at $206 found 13 hours ago
Thu, Aug 21 - Mon, Aug 25
PWM
Portland Intl. Jetport
IAD
Washington Dulles Intl.
$209 Roundtrip, found 8 hours ago
$209
Roundtrip
found 8 hours ago
Select United flight, departing Thu, Aug 21 from Portland Intl. Jetport to Washington Dulles Intl., returning Mon, Aug 25, priced at $209 found 8 hours ago