United Flight 3631 Deals & Information (2026/2027)

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United Flight 3631 Route Deals From $204

The cheapest prices found with in the last 7 days for return flights were $179 and $204 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Apr 10 - Sun, May 3
CID
Eastern Iowa
ORD
O'Hare Intl.
$179 Roundtrip, found 1 day ago
$179
Roundtrip
found 1 day ago
Select United flight, departing Fri, Apr 10 from Eastern Iowa to O'Hare Intl., returning Sun, May 3, priced at $179 found 1 day ago
Sat, Jun 6 - Wed, Jun 17
CID
Eastern Iowa
ORD
O'Hare Intl.
$188 Roundtrip, found 3 days ago
$188
Roundtrip
found 3 days ago
Select United flight, departing Sat, Jun 6 from Eastern Iowa to O'Hare Intl., returning Wed, Jun 17, priced at $188 found 3 days ago
Sun, Apr 5 - Thu, Apr 16
CID
Eastern Iowa
ORD
O'Hare Intl.
$193 Roundtrip, found 2 hours ago
$193
Roundtrip
found 2 hours ago
Select United flight, departing Sun, Apr 5 from Eastern Iowa to O'Hare Intl., returning Thu, Apr 16, priced at $193 found 2 hours ago
Fri, Apr 10 - Sun, May 3
CID
Eastern Iowa
ORD
O'Hare Intl.
$194 Roundtrip, found 1 day ago
$194
Roundtrip
found 1 day ago
Select United flight, departing Fri, Apr 10 from Eastern Iowa to O'Hare Intl., returning Sun, May 3, priced at $194 found 1 day ago
Fri, Apr 10 - Sun, May 3
CID
Eastern Iowa
ORD
O'Hare Intl.
$214 Roundtrip, found 1 day ago
$214
Roundtrip
found 1 day ago
Select United flight, departing Fri, Apr 10 from Eastern Iowa to O'Hare Intl., returning Sun, May 3, priced at $214 found 1 day ago
Sun, Apr 5 - Thu, Apr 16
CID
Eastern Iowa
ORD
O'Hare Intl.
$217 Roundtrip, found 2 hours ago
$217
Roundtrip
found 2 hours ago
Select United flight, departing Sun, Apr 5 from Eastern Iowa to O'Hare Intl., returning Thu, Apr 16, priced at $217 found 2 hours ago
Fri, Apr 10 - Sun, May 3
CID
Eastern Iowa
ORD
O'Hare Intl.
$221 Roundtrip, found 1 day ago
$221
Roundtrip
found 1 day ago
Select United flight, departing Fri, Apr 10 from Eastern Iowa to O'Hare Intl., returning Sun, May 3, priced at $221 found 1 day ago
Sat, Jun 6 - Wed, Jun 17
CID
Eastern Iowa
ORD
O'Hare Intl.
$227 Roundtrip, found 3 days ago
$227
Roundtrip
found 3 days ago
Select United flight, departing Sat, Jun 6 from Eastern Iowa to O'Hare Intl., returning Wed, Jun 17, priced at $227 found 3 days ago
Sun, Apr 5 - Thu, Apr 16
CID
Eastern Iowa
ORD
O'Hare Intl.
$229 Roundtrip, found 2 hours ago
$229
Roundtrip
found 2 hours ago
Select United flight, departing Sun, Apr 5 from Eastern Iowa to O'Hare Intl., returning Thu, Apr 16, priced at $229 found 2 hours ago
Sat, Jun 6 - Wed, Jun 17
CID
Eastern Iowa
ORD
O'Hare Intl.
$232 Roundtrip, found 3 days ago
$232
Roundtrip
found 3 days ago
Select United flight, departing Sat, Jun 6 from Eastern Iowa to O'Hare Intl., returning Wed, Jun 17, priced at $232 found 3 days ago

Frequently asked questions

What route does flight number UA3631 take?
UA3631 serves multiple routes, but the most common is between Buffalo Niagara Intl. Airport (BUF) and ORD. If your flight goes direct, you'll arrive in 1 hour and 54 minutes. Multi-stop flights can also operate under this number, as can flights on other routes.
What kind of plane is on flight number UA3631?
If you're booked on flight UA3631 from Buffalo Niagara Intl. Airport (BUF) to O'Hare Intl. Airport (ORD), you'll most likely be on board an Embraer 170. Flight UA3631 serves multiple 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 UA3631 flight with Travelocity, please visit our Customer Service Portal.