United Flight UA3503 Deals & Information (2025/2026)

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United Flight 3503 Route Deals From $70

The cheapest prices found with in the last 7 days for return flights were $137 and $70 for one-way flights to Louisville Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Sep 4 - Tue, Sep 9
IAD
Washington Dulles Intl.
SDF
Louisville Intl.
$137 Roundtrip, found 5 days ago
$137
Roundtrip
found 5 days ago
Select United flight, departing Thu, Sep 4 from Washington Dulles Intl. to Louisville Intl., returning Tue, Sep 9, priced at $137 found 5 days ago
Thu, Aug 14 - Sat, Aug 16
IAD
Washington Dulles Intl.
SDF
Louisville Intl.
$147 Roundtrip, found 12 hours ago
$147
Roundtrip
found 12 hours ago
Select United flight, departing Thu, Aug 14 from Washington Dulles Intl. to Louisville Intl., returning Sat, Aug 16, priced at $147 found 12 hours ago
Thu, Aug 14 - Sat, Aug 16
IAD
Washington Dulles Intl.
SDF
Louisville Intl.
$159 Roundtrip, found 12 hours ago
$159
Roundtrip
found 12 hours ago
Select United flight, departing Thu, Aug 14 from Washington Dulles Intl. to Louisville Intl., returning Sat, Aug 16, priced at $159 found 12 hours ago
Thu, Aug 14 - Sat, Aug 16
IAD
Washington Dulles Intl.
SDF
Louisville Intl.
$163 Roundtrip, found 12 hours ago
$163
Roundtrip
found 12 hours ago
Select United flight, departing Thu, Aug 14 from Washington Dulles Intl. to Louisville Intl., returning Sat, Aug 16, priced at $163 found 12 hours ago
Mon, Oct 20 - Sat, Oct 25
IAD
Washington Dulles Intl.
SDF
Louisville Intl.
$165 Roundtrip, found 4 days ago
$165
Roundtrip
found 4 days ago
Select United flight, departing Mon, Oct 20 from Washington Dulles Intl. to Louisville Intl., returning Sat, Oct 25, priced at $165 found 4 days ago
Fri, Aug 1 - Wed, Aug 6
IAD
Washington Dulles Intl.
SDF
Louisville Intl.
$166 Roundtrip, found 4 days ago
$166
Roundtrip
found 4 days ago
Select United flight, departing Fri, Aug 1 from Washington Dulles Intl. to Louisville Intl., returning Wed, Aug 6, priced at $166 found 4 days ago
Thu, Sep 4 - Tue, Sep 9
IAD
Washington Dulles Intl.
SDF
Louisville Intl.
$173 Roundtrip, found 5 days ago
$173
Roundtrip
found 5 days ago
Select United flight, departing Thu, Sep 4 from Washington Dulles Intl. to Louisville Intl., returning Tue, Sep 9, priced at $173 found 5 days ago
Mon, Oct 20 - Sat, Oct 25
IAD
Washington Dulles Intl.
SDF
Louisville Intl.
$175 Roundtrip, found 4 days ago
$175
Roundtrip
found 4 days ago
Select United flight, departing Mon, Oct 20 from Washington Dulles Intl. to Louisville Intl., returning Sat, Oct 25, priced at $175 found 4 days ago
Thu, Aug 14 - Sat, Aug 16
IAD
Washington Dulles Intl.
SDF
Louisville Intl.
$190 Roundtrip, found 12 hours ago
$190
Roundtrip
found 12 hours ago
Select United flight, departing Thu, Aug 14 from Washington Dulles Intl. to Louisville Intl., returning Sat, Aug 16, priced at $190 found 12 hours ago
Mon, Oct 6 - Wed, Oct 8
IAD
Washington Dulles Intl.
SDF
Louisville Intl.
$192 Roundtrip, found 14 hours ago
$192
Roundtrip
found 14 hours ago
Select United flight, departing Mon, Oct 6 from Washington Dulles Intl. to Louisville Intl., returning Wed, Oct 8, priced at $192 found 14 hours ago

Frequently asked questions

What route does flight number UA3503 take?
UA3503 is used on multiple routes, but the most common is between Dulles Intl. Airport and Hancock Intl. Airport (SYR). If on a non-stop flight, you'll touch down in around 1 hour and 13 minutes. Multi-stop flights can also use the same number, as can flights on other routes.
What kind of plane is on flight number UA3503?
UA3503 is a flight number that serves multiple routes. If you're traveling on the most popular one, Washington Dulles Intl. Airport (IAD) to Syracuse, NY Airport (SYR-Hancock Intl.), there's a strong chance you'll be cruising aboard the Embraer 175.
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 UA3503 flight with Travelocity, please visit our Customer Service Portal.