Frontier Airlines A321
F9Narrow-body jet
Fleet as reported in the 2025 annual filing · Registry & ages refreshed Sep 1, 2026
- Passengers flown a year
- 4.3M
- 3rd-largest Frontier Airlines sub-fleet
- Airframes in the filing
- 21
- Airports served
- 36
- Countries
- 3
- Departures a day
- 66
- Average age
- 9.9 yr
How Frontier Airlines flies its A321
Filed traffic dataThe count above is the A321 airframes Frontier Airlines owns (US DOT Form 41). This is how it actually flew them to 36 airports across 3 countries — the capacity and busiest routes filed with US DOT T-100 over the trailing 12 months.
Departures flown
24,063
May 2026
Seats flown
5,534,490
Passengers
4.3M
Load factor
78.4%
RPM ÷ ASM
Block hours
63,831
Frontier Airlines's busiest A321 routes
Its busiest A321 routes over the trailing 12 months, by departures.
420 departures · 77,566 passengers · 628 mi
80.3%
Load
Orlando – Philadelphia (MCO–PHL)
371 departures · 76,457 passengers · 862 mi
89.6%
Load
Orlando – San Juan (MCO–SJU)
340 departures · 72,130 passengers · 1,189 mi
92.2%
Load
331 departures · 62,864 passengers · 895 mi
82.6%
Load
Denver – Dallas-Fort Worth (DEN–DFW)
309 departures · 58,944 passengers · 641 mi
82.9%
Load
306 departures · 59,015 passengers · 862 mi
83.9%
Load
305 departures · 59,161 passengers · 602 mi
84.3%
Load
Atlanta – Dallas-Fort Worth (ATL–DFW)
303 departures · 62,162 passengers · 731 mi
89.2%
Load
Atlanta – Philadelphia (ATL–PHL)
278 departures · 48,274 passengers · 666 mi
75.5%
Load
Cancún – St Louis (CUN–STL)
251 departures · 43,590 passengers · 1,237 mi
75.5%
Load
242 departures · 43,950 passengers · 762 mi
79.0%
Load
Atlanta – Fort Lauderdale (ATL–FLL)
232 departures · 40,672 passengers · 581 mi
76.2%
Load
232 departures · 41,980 passengers · 404 mi
78.7%
Load
218 departures · 38,137 passengers · 760 mi
76.1%
Load
Denver – Salt Lake City (DEN–SLC)
216 departures · 40,732 passengers · 391 mi
82.0%
Load
The longest and shortest Frontier Airlines A321 flights
The two ends of the type's working envelope, from the routes it actually flew — not what the airframe is certified to do.
Source: US DOT Bureau of Transportation Statistics, T-100 Segment. Data through May 2026.
Where Frontier Airlines flies the A321 from
Frontier Airlines flies its A321 from 36 US airports in 3 countries. The busiest, by departures:
- DEN
1,942 departures · 20 routes
15.6%
Share
- ATL
1,777 departures · 19 routes
14.3%
Share
- MCO
1,453 departures · 14 routes
11.7%
Share
- PHL
689 departures · 7 routes
5.5%
Share
- DFW
631 departures · 6 routes
5.1%
Share
- LAS
554 departures · 6 routes
4.4%
Share
- CUN
Cancún
550 departures · 6 routes
4.4%
Share
- CLE
535 departures · 5 routes
4.3%
Share
- IAH
396 departures · 4 routes
3.2%
Share
- ORD
353 departures · 4 routes
2.8%
Share
Where the A321 sits in Frontier Airlines's fleet
The A321 is 11.8% of Frontier Airlines's 178 tracked mainline aircraft.
Share of Frontier Airlines's mainline fleet · each type a slice
Other Frontier Airlines types
How old is the Frontier Airlines A321 fleet?
Age is measured from each airframe's delivery date — the FAA airworthiness date where available, otherwise the manufacturer's. Bars share a fixed scale across every fleet page, so two carriers can be compared directly.
Monthly Frontier Airlines A321 capacity
Frequently asked
How many A321 does Frontier Airlines have?
Frontier Airlines operates about 21 A321 aircraft — 21 in service and 0 stored in its latest US DOT fleet filing.
Where does Frontier Airlines fly the A321?
Frontier Airlines flies its A321 to about 36 US airports across 3 countries, its busiest route being DEN–LAS.
How old are Frontier Airlines's A321?
Frontier Airlines's A321 fleet averages about 9.9 yr, ranging from 7.7 yr to 10.9 yr.
What is the longest A321 route Frontier Airlines flies?
The longest A321 route Frontier Airlines flew over the trailing 12 months is ATL–LAS, about 1,747 miles.