Barcaldine to BouliaYBAR → YBOU
Barcaldine Airport (YBAR / BCI) in Barcaldine, Australia to Boulia Airport (YBOU / BQL) in Boulia Airport, Australia is 301 nautical miles — 557 kilometres, or 346 statute miles — on the great circle, on an initial bearing of 276°. A business jet at Mach 0.85 and FL410 takes about 1h 05m block time in still air.
Published by Overfly · Airport data: OurAirports, · Last updated
Can the aeroplane make it?
Range here is usable range — book range at long-range cruise, less a reserve allowance. It is the figure that decides whether the leg closes, and it is the question most mappers do not answer.
Wind, month by month
The same business jet at Mach 0.85 and FL410, in each month’s average upper wind. YBAR to YBOU is quickest in January (1h 10m) and slowest in May (1h 15m); YBOU to YBAR is quickest in May (1h 00m) and slowest in January (1h 05m). The wind column is the average along-track component: plus is a tailwind.
| MONTH | YBAR → YBOU | WIND | YBOU → YBAR | WIND |
|---|---|---|---|---|
| January | 1h 10m | −24 kt | 1h 05m | +24 kt |
| February | 1h 10m | −21 kt | 1h 05m | +21 kt |
| March | 1h 10m | −34 kt | 1h 05m | +34 kt |
| April | 1h 10m | −61 kt | 1h 05m | +60 kt |
| May | 1h 15m | −79 kt | 1h 00m | +79 kt |
| June | 1h 15m | −83 kt | 1h 00m | +82 kt |
| July | 1h 15m | −72 kt | 1h 00m | +72 kt |
| August | 1h 15m | −72 kt | 1h 00m | +72 kt |
| September | 1h 15m | −71 kt | 1h 00m | +71 kt |
| October | 1h 15m | −63 kt | 1h 05m | +63 kt |
| November | 1h 10m | −60 kt | 1h 05m | +60 kt |
| December | 1h 10m | −42 kt | 1h 05m | +41 kt |
Monthly means for 1991–2020 from NOAA’s NCEP/NCAR Reanalysis, at the pressure level nearest the cruise (about FL387), along the great circle. An average is smoother than any one day’s jet stream, so a given flight can see much more or much less; airlines also move the track to use the wind, which this does not. More in how wind changes block time.
How far from an airport?
The worst point on the great circle is 1h 08m from the nearest suitable airport, Cairns (YBCS), at the one-engine diversion speed Overfly uses (430 kt in still air). A twin flying this track needs ETOPS 120 approval or more: ETOPS 120 allows up to 120 minutes from an alternate.
A suitable airport here is one OurAirports classes as large with a runway of 8,000 ft or more. An operator’s real alternates also depend on weather, fire cover and approval, and its diversion speed on the type. More in equal-time points and ETOPS, explained.
The two fields
Questions people ask about this route
How far is it from Barcaldine (YBAR) to Boulia (YBOU)?
301 nautical miles. That is 557 kilometres or 346 statute miles, measured as a great circle between Barcaldine Airport and Boulia Airport.
How long is the flight from Barcaldine to Boulia?
About 1h 05m block time for a business jet cruising at Mach 0.85 at FL410 in still air, including 30 minutes of taxi, climb and descent. Wind moves that figure in either direction — eastbound across the North Atlantic or the Pacific it can be an hour or more. This page is deliberately still-air so the figure is stable and citable; to apply the month's average upper winds from NOAA, open the route in the mapper and switch on seasonal winds.
How much does wind change the flight time between Barcaldine and Boulia?
In the average upper wind, Barcaldine to Boulia at Mach 0.85 runs from 1h 10m in January to 1h 15m in May, and the return from 1h 00m in May to 1h 05m in January. Those are 1991–2020 monthly means from NOAA's reanalysis; on a given day the jet stream can make the difference larger or smaller.
What is the initial bearing from Barcaldine (YBAR) to Boulia (YBOU)?
276° true at the departure point. A great circle changes heading continuously, so this is the initial bearing, not a constant one.
Which aircraft can fly Barcaldine to Boulia non-stop?
Of the types Overfly carries, G650ER, G550, Global 7500, Falcon 8X, Falcon 7X, Challenger 350, A350-900, B777-300ER, A320neo, A320, B737 MAX 8, B737-800, An-124, Concorde, King Air 200, ATR 72, Dash 8 Q400 clear it on usable range — that is book range less a reserve allowance.
For reference and planning interest. Not for operational flight planning. Distances are great circle on a sphere from WGS-84 coordinates; block times assume still air. © 2026 Overfly.Flights