United Flight AA3635 Deals & Information (2025/2026)

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United Flight 3635 Route Deals From $142

The cheapest prices found with in the last 7 days for return flights were $271 and $142 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Sep 19 - Sun, Sep 21
ROC
Greater Rochester Intl.
ORD
O'Hare Intl.
$271 Roundtrip, found 9 hours ago
$271
Roundtrip
found 9 hours ago
Select United flight, departing Fri, Sep 19 from Greater Rochester Intl. to O'Hare Intl., returning Sun, Sep 21, priced at $271 found 9 hours ago
Tue, Jul 22 - Wed, Jul 23
ROC
Greater Rochester Intl.
ORD
O'Hare Intl.
$277 Roundtrip, found 3 days ago
$277
Roundtrip
found 3 days ago
Select United flight, departing Tue, Jul 22 from Greater Rochester Intl. to O'Hare Intl., returning Wed, Jul 23, priced at $277 found 3 days ago

Frequently asked questions

What route does flight number UA3635 take?
UA3635 flies direct between Pittsburgh, PA Airport (PIT-Pittsburgh Intl.) and O'Hare Intl. Airport (ORD) in around 1 hour and 35 minutes. It can sometimes be used on other routes though, some of which may be multi-stop flights. Keep an eye out for this when locking in your seat to avoid any confusion.
What kind of plane is on flight number UA3635?
If you're considering booking flight UA3635 from Pittsburgh Intl. Airport (PIT) to ORD, there's a strong chance you'll be traveling aboard the Embraer 175. This flight number serves a number of different routes, but this is the busiest.
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 UA3635 flight with Travelocity, please visit our Customer Service Portal.