Sun Country Airlines

The story in the figures

Sun Country Airlines' passenger-miles per gallon rose 94% between 2000 and 2025, from 40.0 to 77.6. Most of that came from the aircraft: seat-miles per gallon rose 64%, while planes ran fuller, with 71% of seat-miles filled in 2000 against 84% in 2025.

Its best year was 2023, at 81.4 passenger-miles per gallon, and its latest figure sits 4.7% below that.

In 2020 the pandemic emptied the cabins: load factor dropped from 81% to 65%, and passenger-miles per gallon fell from 75.3 to 63.6. A flight burns most of its fuel whether the seats are full or not, which is why an empty year looks so bad per passenger. By 2025 the figure was 3.0% above its 2019 level.

Against the all-airline figure for 2025 (60.6), Sun Country Airlines was 28% better. On a 1,000 mile trip that works out to 126 kg of CO2 for one passenger, from burning jet fuel only.

What one seat costs the climate

CO2 for one passenger on Sun Country Airlines, from burning jet fuel only.

• 63 kgover 500 miles
• 126 kgover 1,000 miles
• 251 kgover 2,000 miles

Year-by-year figures

Year	Passenger-miles per gallon	kg CO2 per passenger-mile	Seat-miles per gallon	Load factor	Passengers (millions)	Fuel (million gallons)	CO2 (thousand tonnes)
2025	77.6	0.126	92.9	83.6%	4.2	69	674
2024	78.5	0.124	93.3	84.2%	4.5	72	700
2023	81.4	0.120	94.3	86.4%	4.1	64	624
2022	80.0	0.122	95.8	83.5%	3.6	59	573
2021	73.5	0.133	98.3	74.7%	2.7	49	479
2020	63.6	0.153	98.5	64.6%	1.7	35	345
2019	75.3	0.129	92.8	81.2%	3.5	62	607
2018	71.2	0.137	89.1	79.8%	2.6	51	500
2017	65.6	0.149	82.9	79.1%	2.5	52	509
2016	63.1	0.154	81.9	77.0%	2.4	51	500
2015	61.8	0.158	77.4	79.8%	2.3	49	480
2014	57.6	0.169	79.5	72.5%	2.0	44	430
2013	56.2	0.173	75.7	74.3%	1.8	41	397
2012	57.5	0.169	74.8	77.0%	1.5	34	327
2011	61.2	0.159	79.7	76.8%	1.4	29	286
2010	58.2	0.167	75.6	77.0%	1.2	26	253
2009	60.4	0.161	80.6	75.0%	1.2	25	246
2008	62.4	0.156	85.1	73.4%	1.5	32	308
2007	59.3	0.165	89.0	66.6%	1.7	37	365
2006	59.8	0.163	87.6	68.2%	1.6	35	340
2005	60.6	0.161	86.2	70.3%	1.6	34	328
2004	60.1	0.162	85.5	70.3%	1.2	25	243
2003	66.0	0.148	93.2	70.8%	0.9	16	156
2001	39.4	0.248	53.4	73.8%	1.9	58	568
2000	40.0	0.244	56.7	70.6%	2.3	67	657

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The Sun Country Airlines fleet

Sun Country Airlines operated 47 passenger aircraft of its own in 2025. The average age was 16.0 years: 0% of the aircraft were under five years old and 30% were twenty or older. The oldest was a Boeing 737-800 built in 2001. That's the 11th youngest of the 12 airlines ranked here.

In 2006 the average age was 5.0 years across 13 aircraft. It's older now by 11.0 years, and the fleet is bigger.

On the Boeing 737-800, Sun Country Airlines fits 183 seats on average, against a median of 172 at the other airlines that fly it (154 to 189). Seats on the same aircraft are one reason fuel per seat and fuel per passenger differ between airlines: the fuel burned by a given plane is much the same, and more seats share it.

Sun Country Airlines aircraft by model, 2025

Model	Aircraft	Average seats	Other airlines, median seats	Average age
Boeing 737-800	44	183	172	16.4
Other models	3

All the airlines are compared on the fleets page.

Neighbours in the ranking

Nearby airline results

These airlines sit nearby by passenger-miles per gallon in their last data year. Historical airlines have different end years, shown here, so this isn't a same-year ranking.

Airline references

• Wikipedia: Sun Country Airlines
• Official site: Sun Country Airlines

Source: US Bureau of Transportation Statistics (BTS), Schedule P-12(a) fuel, T-100 traffic and regional Schedule T-2 filings; US EPA jet-fuel CO2 factor. See the methodology.