United Flight 3503 Deals & Information (2026/2027)

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United Flight 3503 Route Deals From $286

The cheapest prices found with in the last 7 days for return flights were $289 and $286 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Feb 10 - Thu, Feb 18
MLI
Quad City Intl.
ORD
O'Hare Intl.
$289 Roundtrip, found 19 hours ago
$289
Roundtrip
found 19 hours ago
Select United flight, departing Wed, Feb 10 from Quad City Intl. to O'Hare Intl., returning Thu, Feb 18, priced at $289 found 19 hours ago
Fri, Sep 18 - Sun, Sep 20
MLI
Quad City Intl.
ORD
O'Hare Intl.
$354 Roundtrip, found 6 days ago
$354
Roundtrip
found 6 days ago
Select United flight, departing Fri, Sep 18 from Quad City Intl. to O'Hare Intl., returning Sun, Sep 20, priced at $354 found 6 days ago
Wed, Feb 10 - Thu, Feb 18
MLI
Quad City Intl.
ORD
O'Hare Intl.
$359 Roundtrip, found 19 hours ago
$359
Roundtrip
found 19 hours ago
Select United flight, departing Wed, Feb 10 from Quad City Intl. to O'Hare Intl., returning Thu, Feb 18, priced at $359 found 19 hours ago
Wed, Dec 2 - Sun, Dec 6
MLI
Quad City Intl.
ORD
O'Hare Intl.
$368 Roundtrip, found 2 days ago
$368
Roundtrip
found 2 days ago
Select United flight, departing Wed, Dec 2 from Quad City Intl. to O'Hare Intl., returning Sun, Dec 6, priced at $368 found 2 days ago
Wed, Dec 2 - Sun, Dec 6
MLI
Quad City Intl.
ORD
O'Hare Intl.
$380 Roundtrip, found 2 days ago
$380
Roundtrip
found 2 days ago
Select United flight, departing Wed, Dec 2 from Quad City Intl. to O'Hare Intl., returning Sun, Dec 6, priced at $380 found 2 days ago
Fri, Sep 18 - Sun, Sep 20
MLI
Quad City Intl.
ORD
O'Hare Intl.
$389 Roundtrip, found 6 days ago
$389
Roundtrip
found 6 days ago
Select United flight, departing Fri, Sep 18 from Quad City Intl. to O'Hare Intl., returning Sun, Sep 20, priced at $389 found 6 days ago
Fri, Sep 18 - Sun, Sep 20
MLI
Quad City Intl.
ORD
O'Hare Intl.
$394 Roundtrip, found 6 days ago
$394
Roundtrip
found 6 days ago
Select United flight, departing Fri, Sep 18 from Quad City Intl. to O'Hare Intl., returning Sun, Sep 20, priced at $394 found 6 days ago
Fri, Sep 18 - Sun, Sep 20
MLI
Quad City Intl.
ORD
O'Hare Intl.
$425 Roundtrip, found 6 days ago
$425
Roundtrip
found 6 days ago
Select United flight, departing Fri, Sep 18 from Quad City Intl. to O'Hare Intl., returning Sun, Sep 20, priced at $425 found 6 days ago
Wed, Feb 10 - Thu, Feb 18
MLI
Quad City Intl.
ORD
O'Hare Intl.
$429 Roundtrip, found 19 hours ago
$429
Roundtrip
found 19 hours ago
Select United flight, departing Wed, Feb 10 from Quad City Intl. to O'Hare Intl., returning Thu, Feb 18, priced at $429 found 19 hours ago
Wed, Dec 2 - Sun, Dec 6
MLI
Quad City Intl.
ORD
O'Hare Intl.
$438 Roundtrip, found 2 days ago
$438
Roundtrip
found 2 days ago
Select United flight, departing Wed, Dec 2 from Quad City Intl. to O'Hare Intl., returning Sun, Dec 6, priced at $438 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.