United Flight AA591 Deals & Information (2025/2026)

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United Flight 591 Route Deals From $39

The cheapest prices found with in the last 7 days for return flights were $82 and $39 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, May 26 - Mon, Jun 9
CVG
Cincinnati - Northern Kentucky Intl.
ORD
O'Hare Intl.
$82 Roundtrip, found 2 days ago
$82
Roundtrip
found 2 days ago
Select United flight, departing Mon, May 26 from Cincinnati - Northern Kentucky Intl. to O'Hare Intl., returning Mon, Jun 9, priced at $82 found 2 days ago
Wed, May 14 - Thu, May 15
CVG
Cincinnati - Northern Kentucky Intl.
ORD
O'Hare Intl.
$90 Roundtrip, found 3 days ago
$90
Roundtrip
found 3 days ago
Select United flight, departing Wed, May 14 from Cincinnati - Northern Kentucky Intl. to O'Hare Intl., returning Thu, May 15, priced at $90 found 3 days ago
Thu, Sep 11 - Tue, Sep 16
CVG
Cincinnati - Northern Kentucky Intl.
ORD
O'Hare Intl.
$116 Roundtrip, found 1 day ago
$116
Roundtrip
found 1 day ago
Select United flight, departing Thu, Sep 11 from Cincinnati - Northern Kentucky Intl. to O'Hare Intl., returning Tue, Sep 16, priced at $116 found 1 day ago
Wed, May 21 - Fri, May 23
CVG
Cincinnati - Northern Kentucky Intl.
ORD
O'Hare Intl.
$125 Roundtrip, found 1 day ago
$125
Roundtrip
found 1 day ago
Select United flight, departing Wed, May 21 from Cincinnati - Northern Kentucky Intl. to O'Hare Intl., returning Fri, May 23, priced at $125 found 1 day ago
Mon, May 26 - Mon, Jun 9
CVG
Cincinnati - Northern Kentucky Intl.
ORD
O'Hare Intl.
$133 Roundtrip, found 2 days ago
$133
Roundtrip
found 2 days ago
Select United flight, departing Mon, May 26 from Cincinnati - Northern Kentucky Intl. to O'Hare Intl., returning Mon, Jun 9, priced at $133 found 2 days ago
Mon, May 26 - Mon, Jun 9
CVG
Cincinnati - Northern Kentucky Intl.
ORD
O'Hare Intl.
$142 Roundtrip, found 2 days ago
$142
Roundtrip
found 2 days ago
Select United flight, departing Mon, May 26 from Cincinnati - Northern Kentucky Intl. to O'Hare Intl., returning Mon, Jun 9, priced at $142 found 2 days ago
Mon, May 19 - Sun, Jun 1
CVG
Cincinnati - Northern Kentucky Intl.
ORD
O'Hare Intl.
$145 Roundtrip, found 1 day ago
$145
Roundtrip
found 1 day ago
Select United flight, departing Mon, May 19 from Cincinnati - Northern Kentucky Intl. to O'Hare Intl., returning Sun, Jun 1, priced at $145 found 1 day ago

Frequently asked questions

What route does flight number UA591 take?
You’ll be landing into DEN from PHX if you’ve booked a ticket on flight number UA591. You’ll be in the sky for 1 hour and 52 minutes on this trip. It’s also good to note that the flight conveniently travels direct.
What terminal does UA591 fly out of?
Flights to and from Sky Harbor Intl. Airport (PHX) and Denver Intl. Airport (DEN) are served by UA591, and those traveling on this route typically depart from Terminal 3.
What kind of plane is on flight number UA591?
Get ready to jump on board a Boeing 737 MAX 9 if you’ve reserved a seat on flight UA591. Most services from Phoenix Sky Harbor Intl. Airport to Denver, CO Airport (DEN-Denver Intl.) operate using this aircraft type.
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 UA591 flight with Travelocity, please visit our Customer Service Portal.