United Flight 3635 Deals & Information (2026/2027)

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United Flight 3635 Route Deals From $120

The cheapest prices found with in the last 7 days for return flights were $237 and $120 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Sep 8 - Mon, Sep 14
RIC
Richmond Intl.
ORD
O'Hare Intl.
$237 Roundtrip, found 6 days ago
$237
Roundtrip
found 6 days ago
Select United flight, departing Tue, Sep 8 from Richmond Intl. to O'Hare Intl., returning Mon, Sep 14, priced at $237 found 6 days ago
Thu, Sep 10 - Mon, Sep 14
RIC
Richmond Intl.
ORD
O'Hare Intl.
$266 Roundtrip, found 11 hours ago
$266
Roundtrip
found 11 hours ago
Select United flight, departing Thu, Sep 10 from Richmond Intl. to O'Hare Intl., returning Mon, Sep 14, priced at $266 found 11 hours ago
Thu, Sep 10 - Mon, Sep 14
RIC
Richmond Intl.
ORD
O'Hare Intl.
$276 Roundtrip, found 11 hours ago
$276
Roundtrip
found 11 hours ago
Select United flight, departing Thu, Sep 10 from Richmond Intl. to O'Hare Intl., returning Mon, Sep 14, priced at $276 found 11 hours ago
Thu, Sep 10 - Mon, Sep 14
RIC
Richmond Intl.
ORD
O'Hare Intl.
$277 Roundtrip, found 11 hours ago
$277
Roundtrip
found 11 hours ago
Select United flight, departing Thu, Sep 10 from Richmond Intl. to O'Hare Intl., returning Mon, Sep 14, priced at $277 found 11 hours ago
Thu, Aug 20 - Mon, Aug 24
RIC
Richmond Intl.
ORD
O'Hare Intl.
$285 Roundtrip, found 3 days ago
$285
Roundtrip
found 3 days ago
Select United flight, departing Thu, Aug 20 from Richmond Intl. to O'Hare Intl., returning Mon, Aug 24, priced at $285 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.