Frontier Airlines Flight 91 Deals & Information (2026/2027)

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Frontier Airlines Flight 91 Route Deals From $93

The cheapest prices found with in the last 7 days for return flights were $201 and $93 for one-way flights to Cancun Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Jun 8 - Tue, Jun 23
PHL
Philadelphia Intl.
CUN
Cancun Intl.
$201 Roundtrip, found 21 hours ago
$201
Roundtrip
found 21 hours ago
Select Frontier Airlines flight, departing Mon, Jun 8 from Philadelphia Intl. to Cancun Intl., returning Tue, Jun 23, priced at $201 found 21 hours ago
Tue, Jul 21 - Tue, Jul 28
PHL
Philadelphia Intl.
CUN
Cancun Intl.
$210 Roundtrip, found 1 hour ago
$210
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Tue, Jul 21 from Philadelphia Intl. to Cancun Intl., returning Tue, Jul 28, priced at $210 found 1 hour ago
Sun, May 31 - Tue, Jun 9
PHL
Philadelphia Intl.
CUN
Cancun Intl.
$210 Roundtrip, just found
$210
Roundtrip
just found
Select Frontier Airlines flight, departing Sun, May 31 from Philadelphia Intl. to Cancun Intl., returning Tue, Jun 9, priced at $210 just found
Tue, Jun 9 - Tue, Jun 23
PHL
Philadelphia Intl.
CUN
Cancun Intl.
$211 Roundtrip, found 1 day ago
$211
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Tue, Jun 9 from Philadelphia Intl. to Cancun Intl., returning Tue, Jun 23, priced at $211 found 1 day ago
Mon, Jul 20 - Thu, Aug 6
PHL
Philadelphia Intl.
CUN
Cancun Intl.
$226 Roundtrip, found 11 hours ago
$226
Roundtrip
found 11 hours ago
Select Frontier Airlines flight, departing Mon, Jul 20 from Philadelphia Intl. to Cancun Intl., returning Thu, Aug 6, priced at $226 found 11 hours ago
Mon, Jun 29 - Mon, Jul 6
PHL
Philadelphia Intl.
CUN
Cancun Intl.
$227 Roundtrip, found 1 day ago
$227
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Mon, Jun 29 from Philadelphia Intl. to Cancun Intl., returning Mon, Jul 6, priced at $227 found 1 day ago
Fri, Apr 24 - Wed, Apr 29
PHL
Philadelphia Intl.
CUN
Cancun Intl.
$237 Roundtrip, found 10 hours ago
$237
Roundtrip
found 10 hours ago
Select Frontier Airlines flight, departing Fri, Apr 24 from Philadelphia Intl. to Cancun Intl., returning Wed, Apr 29, priced at $237 found 10 hours ago
Mon, Jul 20 - Thu, Jul 23
PHL
Philadelphia Intl.
CUN
Cancun Intl.
$242 Roundtrip, found 7 hours ago
$242
Roundtrip
found 7 hours ago
Select Frontier Airlines flight, departing Mon, Jul 20 from Philadelphia Intl. to Cancun Intl., returning Thu, Jul 23, priced at $242 found 7 hours ago
Tue, Apr 28 - Sat, May 2
PHL
Philadelphia Intl.
CUN
Cancun Intl.
$243 Roundtrip, found 1 day ago
$243
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Tue, Apr 28 from Philadelphia Intl. to Cancun Intl., returning Sat, May 2, priced at $243 found 1 day ago
Wed, Apr 22 - Sat, Apr 25
PHL
Philadelphia Intl.
CUN
Cancun Intl.
$248 Roundtrip, found 1 day ago
$248
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Wed, Apr 22 from Philadelphia Intl. to Cancun Intl., returning Sat, Apr 25, priced at $248 found 1 day ago

Frequently asked questions

What route does flight number F991 take?
Flight number F991 operates directly from Philadelphia Airport to Cancun Intl. Airport (CUN). During this trip, expect to be in the air for about 4 hours. It's wise to book ahead to secure your preferred seat.
What terminal does F991 fly out of?
You'll likely be jetting out of Terminal E if you're flying on F991 direct from Philadelphia Intl. Airport (PHL) to Cancun Airport.
What kind of plane is on flight number F991?
There's every chance you'll find yourself jumping on board an Airbus A320 if you're traveling on flight number F991. Generally, this flight departs from Philadelphia Airport and comes in to land at Cancun Airport.
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 F991 flight with Travelocity, please visit our Customer Service Portal.