The Best Months, Weeks and Days to Fly Space-A, From a Year of Roll Calls (2026)

"Be flexible" is the standard timing advice for Space-A, and it is true, and it does not help you pick a week. This page is the version with numbers in it. Everything below comes from roll-call results and 72-hour board snapshots the terminals themselves published between September 2025 and September 2026, counted the same way for every terminal.

The short version. October and November are the easiest months for retirees, August is the hardest by a mile, the Christmas window is the toughest two weeks of the year, and the weekday barely matters. Roll calls cluster in the early morning, and a flight on the 72-hour board typically gives you a day or two of notice.

Month by month

How often Category VI, the last group called, got a seat on the flights where the terminal reported who made the cut:

The shape is not a mystery. Permanent-change-of-station season runs June through August, and families moving on orders travel in Category III, ahead of every retiree. August is the peak of that and the worst month on record. October is the trough of it, schools are in session, and the flights are as empty as they get. April is the sweet spot for volume: the most roll calls of any month and odds in the high 80s.

One caution on September. It shows 772 roll calls but only 315 with a reported category, because several terminals reported less that month. The 83 percent is real but rests on a smaller base than its neighbors.

The holiday windows

Against a baseline of 84 percent and an average of 5 seats used per flight across the year:

Christmas is the one to respect. Demand nearly doubles and the odds drop eleven points. Thanksgiving looks worse than it is: the rate dips but seat usage does not, which says the flights that did fill were the usual busy routes rather than a general crush. Spring break is a non-event for Space-A, which surprises people every year.

Weekday

Month	Roll calls	Reported a category	Cat VI made it
October	717	530	97%
November	600	440	92%
March	865	660	87%
April	952	741	87%
January	674	489	85%
February	686	450	84%
September	772	315	83%
May	917	688	82%
July	818	590	81%
December	693	500	79%
June	707	513	76%
August	869	400	68%

Window	Roll calls	Cat VI made it	Avg seats used
Christmas and New Year (18 Dec to 4 Jan)	279	73%	9
Independence Day (27 Jun to 10 Jul)	289	78%	8
Thanksgiving (20 Nov to 3 Dec)	306	79%	4
Spring break (7 to 29 Mar)	643	87%	4

Wednesday roll calls had the best Category VI rate at 88 percent, Thursday and Saturday the worst at 80 percent. Eight points across the whole week is real but small, and it is swamped by the route. What weekday does control is whether there is a flight at all: Iwakuni to Kadena put 50 of its 96 roll calls on a Friday, Travis to Hickam favors Saturday. The route pages state the weekday pattern for each pair when it is strong enough to trust.

Time of day

Space-A is a morning game. Across 161,697 board observations from 35 terminals, 41 percent of roll calls fell between 0400 and 0859 local time, 22 percent between 0900 and 1259, 19 percent in the afternoon, and 18 percent overnight. Plan to sleep within reach of the terminal the night before, not to drive in the morning of.

How much warning you get

Terminals only post firm flights about 72 hours out, and in practice less. Measured from when a flight first appeared on the 72-hour board to its departure, Sigonella gave about 1.7 days of notice on average, Yokota and Souda Bay 1.8, Travis and Kadena under a day. The Seattle Patriot Express gateway was the most generous at about 2.1 days. A quiet board a week out is normal and means nothing; a free watch on your destination will email you the moment something posts.

And a posted flight is a plan, not a promise. Of the 3,174 flights posted to the boards in the last 120 days, 17 percent disappeared more than twelve hours before they were due to fly, 27 percent changed their roll-call time after posting, and 20 percent changed their seat count. Check the night before and again the morning of.

Putting it together

If your dates can move: October, November, March or April, midweek, on a route the record shows to be roomy. If your dates cannot move and they fall in August or the Christmas window: pick the roomiest gateway you can reach, sign up the day you know, and have the commercial backup priced. The route pages show the best and worst months for each pair when there is enough data to say, which is a better guide than any year-wide average.

What these numbers are. Published roll calls only. Terminals miss days, some flights never reach the public boards, and the true totals run higher than any tracker can see. Every figure carries its own denominator so you can judge it.

Questions people ask

What is the best month to fly Space-A?

October, based on the year ending September 2026: Category VI travelers made the cut on 97 percent of the 530 October roll calls that reported a category. November was next at 92 percent, then March and April at 87 percent. August was the worst month at 68 percent, because PCS season puts families on ordinary leave ahead of retirees.

Is Space-A harder around Christmas?

Yes. From 18 December 2025 to 4 January 2026, Category VI got a seat on 73 percent of reported roll calls against an 84 percent baseline, and the average number of seats used per flight nearly doubled from 5 to 9. Thanksgiving and Independence Day dipped to 79 and 78 percent; spring break was no harder than normal at 87 percent.

Does the day of the week matter for Space-A?

A little. Wednesday roll calls had the best Category VI rate at 88 percent and Thursday and Saturday the worst at 80 percent in the year ending September 2026. The weekday matters far more for whether a given route has a flight at all, which the route pages state for each pair.

What time of day are Space-A roll calls?

Mostly early morning. Across 161,697 board observations from 35 terminals, 41 percent of roll calls fell between 0400 and 0859 local, 22 percent between 0900 and 1259, 19 percent in the afternoon and 18 percent overnight.

How much notice do you get before a Space-A flight?

Usually a day or two. Measured from first appearance on the 72-hour board to departure, Sigonella averaged about 1.7 days of notice, Yokota and Souda Bay 1.8, Travis and Kadena under a day, and the Seattle Patriot Express gateway about 2.1 days. About 17 percent of posted flights are removed more than twelve hours before they were due to fly.

Space-A Scout collects 72-hour schedules, Patriot Express calendars and roll-call results from more than a hundred passenger terminals, refreshed every twenty minutes. It is free and no account is required. Built by Luke Connally, USMC, Retired, who flies Space-A himself. See every route we hold records for, every base, or start with the five-minute primer.

The best months and days to fly Space-A, from a year of roll calls