United Flight 1873 Deals & Information (2025/2026)

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United Flight 1873 Route Deals From $153

The cheapest prices found with in the last 7 days for return flights were $277 and $153 for one-way flights to Washington Dulles Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Sep 23 - Tue, Sep 30
SEA
Seattle - Tacoma Intl.
IAD
Washington Dulles Intl.
$277 Roundtrip, found 3 hours ago
$277
Roundtrip
found 3 hours ago
Select United flight, departing Tue, Sep 23 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Tue, Sep 30, priced at $277 found 3 hours ago
Tue, Sep 23 - Tue, Sep 30
SEA
Seattle - Tacoma Intl.
IAD
Washington Dulles Intl.
$287 Roundtrip, found 3 hours ago
$287
Roundtrip
found 3 hours ago
Select United flight, departing Tue, Sep 23 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Tue, Sep 30, priced at $287 found 3 hours ago
Wed, Aug 13 - Wed, Aug 20
SEA
Seattle - Tacoma Intl.
IAD
Washington Dulles Intl.
$289 Roundtrip, found 20 hours ago
$289
Roundtrip
found 20 hours ago
Select United flight, departing Wed, Aug 13 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Wed, Aug 20, priced at $289 found 20 hours ago
Tue, Sep 16 - Sat, Sep 20
SEA
Seattle - Tacoma Intl.
IAD
Washington Dulles Intl.
$299 Roundtrip, found 1 day ago
$299
Roundtrip
found 1 day ago
Select United flight, departing Tue, Sep 16 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Sat, Sep 20, priced at $299 found 1 day ago
Wed, Aug 13 - Wed, Aug 20
SEA
Seattle - Tacoma Intl.
IAD
Washington Dulles Intl.
$301 Roundtrip, found 20 hours ago
$301
Roundtrip
found 20 hours ago
Select United flight, departing Wed, Aug 13 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Wed, Aug 20, priced at $301 found 20 hours ago
Tue, Sep 23 - Tue, Sep 30
SEA
Seattle - Tacoma Intl.
IAD
Washington Dulles Intl.
$302 Roundtrip, found 3 hours ago
$302
Roundtrip
found 3 hours ago
Select United flight, departing Tue, Sep 23 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Tue, Sep 30, priced at $302 found 3 hours ago
Tue, Sep 23 - Tue, Sep 30
SEA
Seattle - Tacoma Intl.
IAD
Washington Dulles Intl.
$305 Roundtrip, found 3 hours ago
$305
Roundtrip
found 3 hours ago
Select United flight, departing Tue, Sep 23 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Tue, Sep 30, priced at $305 found 3 hours ago
Wed, Aug 13 - Wed, Aug 20
SEA
Seattle - Tacoma Intl.
IAD
Washington Dulles Intl.
$309 Roundtrip, found 20 hours ago
$309
Roundtrip
found 20 hours ago
Select United flight, departing Wed, Aug 13 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Wed, Aug 20, priced at $309 found 20 hours ago
Wed, Aug 13 - Wed, Aug 20
SEA
Seattle - Tacoma Intl.
IAD
Washington Dulles Intl.
$309 Roundtrip, found 20 hours ago
$309
Roundtrip
found 20 hours ago
Select United flight, departing Wed, Aug 13 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Wed, Aug 20, priced at $309 found 20 hours ago
Wed, Aug 13 - Wed, Aug 20
SEA
Seattle - Tacoma Intl.
IAD
Washington Dulles Intl.
$311 Roundtrip, found 20 hours ago
$311
Roundtrip
found 20 hours ago
Select United flight, departing Wed, Aug 13 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Wed, Aug 20, priced at $311 found 20 hours ago