United Flight AA3665 Deals & Information (2025/2026)

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United Flight 3665 Route Deals From $49

The cheapest prices found with in the last 7 days for return flights were $99 and $49 for one-way flights to Gerald R. Ford Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Oct 13 - Tue, Oct 14
ORD
O'Hare Intl.
GRR
Gerald R. Ford Intl.
$99 Roundtrip, found 4 days ago
$99
Roundtrip
found 4 days ago
Select United flight, departing Mon, Oct 13 from O'Hare Intl. to Gerald R. Ford Intl., returning Tue, Oct 14, priced at $99 found 4 days ago
Mon, Oct 13 - Tue, Oct 14
ORD
O'Hare Intl.
GRR
Gerald R. Ford Intl.
$99 Roundtrip, found 4 days ago
$99
Roundtrip
found 4 days ago
Select United flight, departing Mon, Oct 13 from O'Hare Intl. to Gerald R. Ford Intl., returning Tue, Oct 14, priced at $99 found 4 days ago
Mon, Oct 13 - Tue, Oct 14
ORD
O'Hare Intl.
GRR
Gerald R. Ford Intl.
$125 Roundtrip, found 4 days ago
$125
Roundtrip
found 4 days ago
Select United flight, departing Mon, Oct 13 from O'Hare Intl. to Gerald R. Ford Intl., returning Tue, Oct 14, priced at $125 found 4 days ago
Mon, Oct 13 - Tue, Oct 14
ORD
O'Hare Intl.
GRR
Gerald R. Ford Intl.
$125 Roundtrip, found 4 days ago
$125
Roundtrip
found 4 days ago
Select United flight, departing Mon, Oct 13 from O'Hare Intl. to Gerald R. Ford Intl., returning Tue, Oct 14, priced at $125 found 4 days ago
Mon, Oct 13 - Tue, Oct 14
ORD
O'Hare Intl.
GRR
Gerald R. Ford Intl.
$129 Roundtrip, found 4 days ago
$129
Roundtrip
found 4 days ago
Select United flight, departing Mon, Oct 13 from O'Hare Intl. to Gerald R. Ford Intl., returning Tue, Oct 14, priced at $129 found 4 days ago
Wed, Oct 22 - Thu, Oct 23
ORD
O'Hare Intl.
GRR
Gerald R. Ford Intl.
$139 Roundtrip, found 5 days ago
$139
Roundtrip
found 5 days ago
Select United flight, departing Wed, Oct 22 from O'Hare Intl. to Gerald R. Ford Intl., returning Thu, Oct 23, priced at $139 found 5 days ago
Wed, Oct 22 - Thu, Oct 23
ORD
O'Hare Intl.
GRR
Gerald R. Ford Intl.
$146 Roundtrip, found 5 days ago
$146
Roundtrip
found 5 days ago
Select United flight, departing Wed, Oct 22 from O'Hare Intl. to Gerald R. Ford Intl., returning Thu, Oct 23, priced at $146 found 5 days ago
Wed, Oct 22 - Thu, Oct 23
ORD
O'Hare Intl.
GRR
Gerald R. Ford Intl.
$163 Roundtrip, found 5 days ago
$163
Roundtrip
found 5 days ago
Select United flight, departing Wed, Oct 22 from O'Hare Intl. to Gerald R. Ford Intl., returning Thu, Oct 23, priced at $163 found 5 days ago
Mon, Oct 13 - Tue, Oct 14
ORD
O'Hare Intl.
GRR
Gerald R. Ford Intl.
$165 Roundtrip, found 4 days ago
$165
Roundtrip
found 4 days ago
Select United flight, departing Mon, Oct 13 from O'Hare Intl. to Gerald R. Ford Intl., returning Tue, Oct 14, priced at $165 found 4 days ago
Wed, Oct 22 - Thu, Oct 23
ORD
O'Hare Intl.
GRR
Gerald R. Ford Intl.
$170 Roundtrip, found 5 days ago
$170
Roundtrip
found 5 days ago
Select United flight, departing Wed, Oct 22 from O'Hare Intl. to Gerald R. Ford Intl., returning Thu, Oct 23, priced at $170 found 5 days ago

Frequently asked questions

What route does flight number UA3665 take?
UA3665 is used on a range of routes. Most commonly, UA3665 flies direct from ORD to Kansas City, MO Airport (MCI-Kansas City Intl.). If that's your flight path, you'll be flying for around 1 hour and 41 minutes.
What terminal does UA3665 fly out of?
Terminal 2 is the terminal you'll likely take off from if you're booked on a flight from O'Hare Airport. ORD to Kansas City, MO Airport (MCI-Kansas City Intl.) is the most commonly traveled route for flight number UA3665.
What kind of plane is on flight number UA3665?
UA3665 is a flight number that serves several routes. If you're heading off on the most popular route, O'Hare Airport to Kansas City, MO Airport (MCI-Kansas City Intl.), there's a good chance you'll be climbing on board an Embraer 170.
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 UA3665 flight with Travelocity, please visit our Customer Service Portal.