Guide
Flying in January: good punctuality, the year's worst cancellations
US flights ran 79.2% on time in January 2026, above the 77.3% annual rate. The risk was cancellation, and it hit the South harder than the snow belt.
In January 2026, 79.2% of US domestic flights arrived on time. That beat the 77.3% recorded across the whole of September 2025 to August 2026, and on the punctuality measure January was one of the better months of the year.
It was also the month that cancelled the most flights. Across the country 4.71% of scheduled departures never left in January 2026, more than twice the annual rate of 1.89%. Both figures are true at once, and the gap between them is the single most useful thing to understand about flying in January.
Why the two numbers disagree
The DOT on-time rate is calculated on completed flights only. A flight that is cancelled drops out of the calculation, and in winter airlines cancel early and at scale: when ice or heavy snow is forecast, the schedule is thinned the evening before rather than left to run four hours late. The flights that would have been the worst performers are removed before they can drag the on-time figure down. The winter storm guide covers that mechanism and the recovery that follows a storm.
The rest of January helps the on-time rate for a different reason. After the New Year return, demand falls away. January carried the second-thinnest schedule of the twelve months, behind only February, and a thin schedule means spare aircraft, spare crews and emptier hubs. On a day without weather, the system has slack it does not have in July.
So January behaves like two months stacked on top of each other: long stretches of quiet, well-run flying, and a few days on which parts of the country simply stop.
Where the cancellations landed
The instinct is to fear the snow belt.
In January 2026 the data points somewhere else.
The heaviest cancellation rates sat at southern and mid-Atlantic airports. Charlotte in January cancelled roughly one departure in nine, and Dallas-Fort Worth in January and Washington National in January each lost close to one in ten, against annual rates of 2.06%, 2.61% and 3.99%. Raleigh-Durham and Nashville were not far behind. The pattern is consistent with the ice and snow storm that crossed the South and the East Coast in the last week of the month: freezing rain tends to shut an airport that rarely sees it far more completely than a foot of snow shuts one that clears runways every week.
Charlotte, Dallas-Fort Worth and Washington National are all American Airlines hubs, and the airline carried much of the damage. American at Charlotte and American at Dallas-Fort Worth are the two largest operations in its network, and American's regional PSA Airlines, which flies mainly from Charlotte and Washington National, cancelled the largest share of its January schedule of any carrier at the big airports. On punctuality the ranking looks different.
US average 79.2%
60.0%90.0%
Source: US DOT Bureau of Transportation Statistics, September 2025 to August 2026.
Southwest Airlines led at 84.8% and JetBlue Airways was last at 68.4%. For Southwest, January was the best month of the year: its airline page shows 84.8% against an annual 75.7%. Punctuality and cancellations do not always move together: a carrier that cancels aggressively can post a respectable on-time figure while stranding more people, so read both columns on any airline page before booking.
The holiday inside the month
Martin Luther King Jr. weekend is January's only travel holiday, and this site measures it against the two weeks either side.
During the holidayNormal weeks either side
50.0%85.0%
All US flights. Normal weeks are the two weeks either side of the window, excluding other holidays. Source: US DOT Bureau of Transportation Statistics, September 2025 to August 2026.
In 2026 the weekend (Friday 16 January to Monday 19 January 2026) ran 76.8% on time, 3.5 points worse than its normal weeks. The cancellation figures tell the more interesting story: 0.74% during the holiday against 5.54% in the surrounding weeks. The disruption of January 2026 fell outside the long weekend, not on it. The 2026 MLK weekend page has the day-by-day record.
The 2024 weekend is the warning. It ran just 59.0% on time with 10.42% of flights cancelled, the worst of the four MLK weekends on record here, and it coincided with a severe cold outbreak across the northern states. The MLK weekend overview sets all four years side by side. Four years is a small sample; what it shows is that the weekend itself is not reliably worse than January generally.
The weather decides.
The best and worst airports in January
US average 79.2%
55.0%95.0%
Source: US DOT Bureau of Transportation Statistics, September 2025 to August 2026.
San Jose (SJC) led at 89.3%, with Oakland (OAK) close behind. San Jose in January and Oakland in January, both secondary Bay Area fields, had no convection, no snow and light schedules. The bigger surprise is Texas. Houston Hobby in January ran 88.0% on time against 76.5% for the year, and Dallas Love Field in January managed 82.8% against an annual 72.6%. Both are Southwest-dominated airports whose real trouble comes with summer thunderstorms, and January was the best month of the year at both. The short hop between them, Houston Hobby to Dallas Love Field, ran 92.4% on time in January.
At the other end, Detroit finished last at 64.8%, far below its annual 76.7%. Most of Detroit's January delay minutes were coded to the airlines themselves, but Delta's hubs put more delay under that category than the national split all year, and I read that as a reporting convention rather than a finding. The on-time rates are not convention: Delta at Detroit and its regional partner SkyWest at Detroit both ran far below their annual rates there in January, as they had in December. Chicago O'Hare ran 67.4% and Minneapolis in January 72.9%, well under its 79.2% annual figure.
That cuts against the usual advice that the upper Midwest hubs handle winter best. In January 2026 they did not, while the Rocky Mountain fields did. Denver in January ran 82.3% and Salt Lake City in January 85.5%, both at or above their annual rates, with cancellation rates a fraction of the southern hubs'. One January is one sample, and a single storm could reverse the Midwest result next year, so treat this as what happened rather than as a rule.
Detroit (DTW)76.7% overall
Minneapolis (MSP)79.2% overall
Denver (DEN)76.6% overall
Salt Lake City (SLC)84.2% overall
All panels share one scale, 55% to 95% on time. Source: US DOT Bureau of Transportation Statistics, September 2025 to August 2026.
The routes between the Great Lakes hubs took the worst of it. Chicago O'Hare to Detroit ran 59.7% on time in January and O'Hare to Milwaukee 54.8%: short flights that inherit O'Hare's delays at one end and winter weather at both.
If it were my January ticket
Do not avoid the long weekend on principle. In 2026 the MLK weekend cancelled a fraction of what the weeks around it did, and in three of the four years on record its on-time rate sat within a few points of normal. The storms are not tied to any date.
Treat ice in the South as the bigger threat. A forecast of freezing rain for Charlotte, Dallas or Nashville would move my trip faster than a snow forecast for Denver or Salt Lake City. Airlines issue change waivers ahead of named storms; using one two days early costs nothing.
Connect west when the choice exists. In this data Denver, Salt Lake City and Phoenix all ran better Januaries than the Great Lakes hubs, and a January connection is where I would use them. The connection risk tool shows how much buffer each hub's record calls for.
Take the first departure. Nationally the 5am–8am window runs 89.3% on time against 68.0% for 5pm–8pm. In January the bigger benefit is that a morning cancellation still leaves a day of rebooking options.
Read the cancellation column, not only the on-time rate. Every airport's January page shows both. A good on-time rate in a storm month can simply mean the worst flights never flew, which is the distortion the cancellation rate guide explains. February brings a different set of risks, covered in the February guide.
January by airport: Charlotte (CLT) · Dallas-Fort Worth (DFW) · Detroit (DTW) · Chicago O'Hare (ORD) · Houston Hobby (HOU) · San Jose (SJC) · Denver (DEN) · Compare any US route