Frontier Airlines Flight 45 Deals & Information (2026/2027)

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Frontier Airlines Flight 45 Route Deals From $153

The cheapest prices found with in the last 7 days for return flights were $144 and $153 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Jan 22 - Mon, Jan 26
CUN
Cancun Intl.
ORD
O'Hare Intl.
$144 Roundtrip, found 21 hours ago
$144
Roundtrip
found 21 hours ago
Select Frontier Airlines flight, departing Thu, Jan 22 from Cancun Intl. to O'Hare Intl., returning Mon, Jan 26, priced at $144 found 21 hours ago
Wed, Feb 25 - Mon, Mar 2
CUN
Cancun Intl.
ORD
O'Hare Intl.
$154 Roundtrip, found 1 day ago
$154
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Wed, Feb 25 from Cancun Intl. to O'Hare Intl., returning Mon, Mar 2, priced at $154 found 1 day ago
Wed, Mar 4 - Sun, Mar 8
CUN
Cancun Intl.
ORD
O'Hare Intl.
$163 Roundtrip, found 1 day ago
$163
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Wed, Mar 4 from Cancun Intl. to O'Hare Intl., returning Sun, Mar 8, priced at $163 found 1 day ago
Fri, Jan 16 - Sun, Jan 18
CUN
Cancun Intl.
ORD
O'Hare Intl.
$170 Roundtrip, found 2 days ago
$170
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Fri, Jan 16 from Cancun Intl. to O'Hare Intl., returning Sun, Jan 18, priced at $170 found 2 days ago
Wed, Mar 4 - Mon, Mar 9
CUN
Cancun Intl.
ORD
O'Hare Intl.
$173 Roundtrip, found 3 days ago
$173
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Wed, Mar 4 from Cancun Intl. to O'Hare Intl., returning Mon, Mar 9, priced at $173 found 3 days ago
Sat, Jan 24 - Tue, Jan 27
CUN
Cancun Intl.
ORD
O'Hare Intl.
$173 Roundtrip, found 3 days ago
$173
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Sat, Jan 24 from Cancun Intl. to O'Hare Intl., returning Tue, Jan 27, priced at $173 found 3 days ago
Wed, Feb 18 - Wed, Mar 18
CUN
Cancun Intl.
ORD
O'Hare Intl.
$174 Roundtrip, found 1 day ago
$174
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Wed, Feb 18 from Cancun Intl. to O'Hare Intl., returning Wed, Mar 18, priced at $174 found 1 day ago
Sat, Feb 21 - Wed, Feb 25
CUN
Cancun Intl.
ORD
O'Hare Intl.
$190 Roundtrip, found 3 days ago
$190
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Sat, Feb 21 from Cancun Intl. to O'Hare Intl., returning Wed, Feb 25, priced at $190 found 3 days ago
Wed, Feb 25 - Mon, Mar 2
CUN
Cancun Intl.
ORD
O'Hare Intl.
$198 Roundtrip, found 1 day ago
$198
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Wed, Feb 25 from Cancun Intl. to O'Hare Intl., returning Mon, Mar 2, priced at $198 found 1 day ago
Sat, Feb 28 - Wed, Mar 4
CUN
Cancun Intl.
ORD
O'Hare Intl.
$200 Roundtrip, found 1 day ago
$200
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sat, Feb 28 from Cancun Intl. to O'Hare Intl., returning Wed, Mar 4, priced at $200 found 1 day ago

Frequently asked questions

What route does flight number F945 take?
You'll be landing at Chicago, IL Airport (ORD-O'Hare Intl.) from Cancun Airport if you've booked a ticket on flight number F945. You'll be in the air for 4 hours during this trip. What's more, the flight conveniently travels non-stop.
How often is F945 on time?
Approximately 83% of F945 flights arrive on time — so if you'll be up in the air between Cancun, Quintana Roo Airport (CUN-Cancun Intl.) and O'Hare Intl. Airport (ORD), you can relax in confidence knowing that you will reach your destination ASAP. On the rare occasion that this Frontier Airlines flight encounters a delay, you can expect a wait time of roughly 29 minutes. Thanks to the airline's top-notch service, this route has a star rating of 2.2.
What terminal does F945 fly out of?
You'll likely be taking off from Terminal 4 if you're traveling on flight number F945 direct from CUN to Chicago, IL Airport (ORD-O'Hare Intl.).
What kind of plane is on flight number F945?
The route for flight number F945 is almost always Cancun Airport to O'Hare Intl. Airport (ORD), and the Airbus A320 is the type of plane you'll probably be taking off on.
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 F945 flight with Travelocity, please visit our Customer Service Portal.