United Flight 3503 Deals & Information (2026/2027)

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United Flight 3503 Route Deals From $59

The cheapest prices found with in the last 7 days for return flights were $117 and $59 for one-way flights to Logan Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Nov 6 - Sun, Nov 8
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$117 Roundtrip, found 19 hours ago
$117
Roundtrip
found 19 hours ago
Select United flight, departing Fri, Nov 6 from Washington Dulles Intl. to Logan Intl., returning Sun, Nov 8, priced at $117 found 19 hours ago
Sat, Nov 7 - Wed, Nov 11
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$125 Roundtrip, found 3 days ago
$125
Roundtrip
found 3 days ago
Select United flight, departing Sat, Nov 7 from Washington Dulles Intl. to Logan Intl., returning Wed, Nov 11, priced at $125 found 3 days ago
Wed, Nov 11 - Sun, Nov 15
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$140 Roundtrip, found 4 days ago
$140
Roundtrip
found 4 days ago
Select United flight, departing Wed, Nov 11 from Washington Dulles Intl. to Logan Intl., returning Sun, Nov 15, priced at $140 found 4 days ago
Sun, Nov 22 - Mon, Nov 23
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$144 Roundtrip, found 2 days ago
$144
Roundtrip
found 2 days ago
Select United flight, departing Sun, Nov 22 from Washington Dulles Intl. to Logan Intl., returning Mon, Nov 23, priced at $144 found 2 days ago
Fri, Jan 15 - Mon, Jan 18
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$152 Roundtrip, found 1 day ago
$152
Roundtrip
found 1 day ago
Select United flight, departing Fri, Jan 15 from Washington Dulles Intl. to Logan Intl., returning Mon, Jan 18, priced at $152 found 1 day ago
Fri, Nov 6 - Sun, Nov 8
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$154 Roundtrip, found 19 hours ago
$154
Roundtrip
found 19 hours ago
Select United flight, departing Fri, Nov 6 from Washington Dulles Intl. to Logan Intl., returning Sun, Nov 8, priced at $154 found 19 hours ago
Thu, Nov 12 - Sat, Nov 14
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$155 Roundtrip, found 3 days ago
$155
Roundtrip
found 3 days ago
Select United flight, departing Thu, Nov 12 from Washington Dulles Intl. to Logan Intl., returning Sat, Nov 14, priced at $155 found 3 days ago
Tue, Nov 17 - Mon, Jan 11
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$165 Roundtrip, found 3 days ago
$165
Roundtrip
found 3 days ago
Select United flight, departing Tue, Nov 17 from Washington Dulles Intl. to Logan Intl., returning Mon, Jan 11, priced at $165 found 3 days ago
Sun, Nov 22 - Mon, Nov 23
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$166 Roundtrip, found 2 days ago
$166
Roundtrip
found 2 days ago
Select United flight, departing Sun, Nov 22 from Washington Dulles Intl. to Logan Intl., returning Mon, Nov 23, priced at $166 found 2 days ago
Sun, Nov 22 - Mon, Nov 23
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$168 Roundtrip, found 2 days ago
$168
Roundtrip
found 2 days ago
Select United flight, departing Sun, Nov 22 from Washington Dulles Intl. to Logan Intl., returning Mon, Nov 23, priced at $168 found 2 days 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.