United Flight 1691 Deals & Information (2026/2027)

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United Flight 1691 Route Deals From $84

The cheapest prices found with in the last 7 days for return flights were $167 and $84 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Aug 23 - Tue, Aug 25
BOS
Logan Intl.
ORD
O'Hare Intl.
$167 Roundtrip, found 19 hours ago
$167
Roundtrip
found 19 hours ago
Select United flight, departing Sun, Aug 23 from Logan Intl. to O'Hare Intl., returning Tue, Aug 25, priced at $167 found 19 hours ago
Thu, Jul 23 - Sat, Jul 25
BOS
Logan Intl.
ORD
O'Hare Intl.
$173 Roundtrip, found 2 days ago
$173
Roundtrip
found 2 days ago
Select United flight, departing Thu, Jul 23 from Logan Intl. to O'Hare Intl., returning Sat, Jul 25, priced at $173 found 2 days ago
Sun, Aug 23 - Tue, Aug 25
BOS
Logan Intl.
ORD
O'Hare Intl.
$179 Roundtrip, found 19 hours ago
$179
Roundtrip
found 19 hours ago
Select United flight, departing Sun, Aug 23 from Logan Intl. to O'Hare Intl., returning Tue, Aug 25, priced at $179 found 19 hours ago
Sun, Jul 19 - Tue, Jul 21
BOS
Logan Intl.
ORD
O'Hare Intl.
$181 Roundtrip, found 18 hours ago
$181
Roundtrip
found 18 hours ago
Select United flight, departing Sun, Jul 19 from Logan Intl. to O'Hare Intl., returning Tue, Jul 21, priced at $181 found 18 hours ago
Tue, Jul 28 - Thu, Jul 30
BOS
Logan Intl.
ORD
O'Hare Intl.
$182 Roundtrip, just found
$182
Roundtrip
just found
Select United flight, departing Tue, Jul 28 from Logan Intl. to O'Hare Intl., returning Thu, Jul 30, priced at $182 just found
Mon, Aug 31 - Tue, Sep 1
BOS
Logan Intl.
ORD
O'Hare Intl.
$184 Roundtrip, found 2 days ago
$184
Roundtrip
found 2 days ago
Select United flight, departing Mon, Aug 31 from Logan Intl. to O'Hare Intl., returning Tue, Sep 1, priced at $184 found 2 days ago
Mon, Jul 6 - Sat, Jul 18
BOS
Logan Intl.
ORD
O'Hare Intl.
$186 Roundtrip, found 4 days ago
$186
Roundtrip
found 4 days ago
Select United flight, departing Mon, Jul 6 from Logan Intl. to O'Hare Intl., returning Sat, Jul 18, priced at $186 found 4 days ago
Tue, Jul 28 - Thu, Jul 30
BOS
Logan Intl.
ORD
O'Hare Intl.
$192 Roundtrip, just found
$192
Roundtrip
just found
Select United flight, departing Tue, Jul 28 from Logan Intl. to O'Hare Intl., returning Thu, Jul 30, priced at $192 just found
Sun, Aug 23 - Tue, Aug 25
BOS
Logan Intl.
ORD
O'Hare Intl.
$198 Roundtrip, found 19 hours ago
$198
Roundtrip
found 19 hours ago
Select United flight, departing Sun, Aug 23 from Logan Intl. to O'Hare Intl., returning Tue, Aug 25, priced at $198 found 19 hours ago
Sun, Aug 23 - Tue, Aug 25
BOS
Logan Intl.
ORD
O'Hare Intl.
$199 Roundtrip, found 19 hours ago
$199
Roundtrip
found 19 hours ago
Select United flight, departing Sun, Aug 23 from Logan Intl. to O'Hare Intl., returning Tue, Aug 25, priced at $199 found 19 hours ago
Tue, Jul 28 - Thu, Jul 30
BOS
Logan Intl.
ORD
O'Hare Intl.
$203 Roundtrip, just found
$203
Roundtrip
just found
Select United flight, departing Tue, Jul 28 from Logan Intl. to O'Hare Intl., returning Thu, Jul 30, priced at $203 just found

Frequently asked questions

What route does flight number UA1691 take?
UA1691 flies direct from Cancun Intl. Airport (CUN) to Denver Intl. Airport (DEN). During this journey, expect to be in the air for roughly 4 hours and 16 minutes. It pays to book ahead to lock in your favorite seat.
How often is UA1691 on time?
If you're traveling on United Airlines flight number UA1691, you may want to have a book or tablet handy — 70% of these flights touch down on time. If your trip experiences a delay, your wait time should be around 17 minutes. This service has a 2.2-star rating.
What terminal does UA1691 fly out of?
Travelers with seats booked on flight number UA1691 from Cancun, Quintana Roo Airport (CUN-Cancun Intl.) to DIA airport typically jet off from Terminal 3.
What kind of plane is on flight number UA1691?
The route for flight number UA1691 is predominantly Cancun Intl. Airport (CUN) to DIA airport, and the Boeing 737-900 is the type of aircraft you're likely to be flying with.
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 UA1691 flight with Travelocity, please visit our Customer Service Portal.