Sony WH-1000XM5 vs Soundcore Space Q45

The flagship against the budget over-ear, on published figures only. One of these two publishes a price, the other publishes 44 grams less, and the 20-hour battery difference is the specification that changes nothing on a plane.

By Sawyer V.Last updated October 6, 2026

We have not tested this gear. Every figure here is compiled from published manufacturer specifications and published airline policies, and the arithmetic is public so you can check it. This page contains affiliate links — see the affiliate disclosure.

For flying, weight decides it — and that favors the Sony. Both clear any flight on earth: the WH-1000XM5 publishes 30 h with noise cancelling on, the Space Q45 publishes 50 h. The Sony publishes 251 g against 295 g. The Space Q45 publishes a $149 price; Sony publishes none at all.

Manufacturer-published specifications, compiled 3 September 2026. We have not listened to either of these and no claim below is about sound quality.

Click any row to jump to the full write-up. Published sizes include wheels and handles.
#	Product	Published weight	Fits	Score	Price
1	Sony WH-1000XM5 Noise-Cancelling HeadphonesLong-haul flights where you would rather not carry a charger for the headphones	0.55 lb	Not published	0.0	$198.00 · Check on Amazon#ad How we earn
2	Soundcore Space Q45 Noise-Cancelling HeadphonesMulti-leg trips where charging the headphones is an annoyance	0.65 lb	Not published	0.0	$99.99 · Check on Amazon#ad How we earn

Prices last verified October 7, 2026. Prices move — the figure you see on Amazon at the moment you click is the real one.

The two, as published

Manufacturer-published figures, compiled 3 September 2026. Neither maker publishes a warranty term in the specification sheets we read, which is unusual at this price and worth noticing on both.
	Sony WH-1000XM5	Soundcore Space Q45
Published weight	251 g	295 g
Published battery, noise cancelling ON	up to 30 h	up to 50 h
Published driver size	30 mm	40 mm
Published Bluetooth	5.2, LDAC	5.3, LDAC
Manufacturer-published price	None published	$149
Published warranty term	None in the specifications we compiled	None in the specifications we compiled
Published fast charge	3 min → 3 h playback (USB-PD)	Not published in the specifications we compiled
Packs flat?	Case does not fold flat	Cups pivot and retract

The 20-hour battery gap is the least useful number here

Anker publishes 50 hours with noise cancelling on, which is the longest figure in our whole ledger and is genuinely impressive. On a plane it is worth almost nothing, and it is worth being precise about why.

The longest scheduled commercial flight in service is under 19 hours. Sony’s published 30 hours already covers that, plus the connection, plus the terminal either side, on one charge. Anker’s extra 20 hours buys you the second leg of a round trip without charging — a real convenience, and a smaller one than the number suggests, because you are near a USB port at both ends.

44 grams, worn for eight hours

44 g is about a sixth of either headphone’s mass and it is carried on the top of your head, not in your bag. Over a long-haul flight that is the difference people actually report noticing, ahead of anything acoustic.

For the bag-weight arithmetic, both are modest: 251 g is 0.553 lb and 295 g is 0.65 lb. Against Hawaiian’s published 25 lb carry-on cap the Sony is 2.2 percent of your allowance and the Anker 2.6. The real cost of an over-ear is volume rather than mass — see below.

The packing problem, where the cheap one wins

Sony’s case does not fold flat. Anker publishes that the Space Q45’s cups pivot and retract, so it packs flatter. In a personal item that is measured against United’s published 17 × 10 × 9 in box, a rigid case that will not flatten competes directly with a laptop for the same flat space.

This is the one practical axis on which the $149 headphone beats the flagship, and it is not a small one if you fly with a laptop and a personal item only.

The price asymmetry, which is the real story

Anker publishes $149. Sony publishes no price at all, which means on this site’s arithmetic the Sony cannot be scored on value — the rule that produces that applies to every product we track and it bites here.

What we can say without a Sony MSRP: the live retail prices for these two are not close, and the gap buys you 44 g less on your head, a fast-charge specification, and a brand-name resale market. It does not buy you a published warranty, because neither maker publishes one.

On 30 mm against 40 mm, and why we are not ranking it

Anker publishes 40 mm drivers against Sony’s 30 mm. It would be easy to treat that as the budget headphone winning a specification, and it would be meaningless. Driver diameter is not a quality measure — tuning, housing and cancellation algorithm matter far more, and none of the three is published as a number by either maker.

Likewise Bluetooth 5.3 against 5.2: both support LDAC, which is the specification that affects what you can stream, and the point revision difference is not audible. We list both figures because they are published and we rank on neither.

What neither of them fixes

Active cancellation is strong against the steady low-frequency engine drone and weak against irregular mid-frequency sound — a baby, a conversation two rows back, a trolley. The irregular sound is what wakes people. Our noise-cancelling headphones page runs that argument in full, and the earplugs page covers the passive side — which is where the irregular noise is actually addressed, at 30 g instead of 251.

If sleeping is the goal rather than listening, the honest recommendation is foam earplugs at under $10, and neither headphone on this page.

Both need the same thing to use the in-flight screen

Neither of these connects to a seat-back entertainment system on its own. That needs a Bluetooth transmitter plugged into the aircraft’s headphone jack — see the adapter page, which publishes the figures for the two we track. It is an easy thing to discover at 35,000 feet rather than before.

The verdict

Buy the Sony if you fly long-haul and the headphone stays on your head for most of it. 44 g less, and a published 3-minute charge that covers 3 hours.
Buy the Space Q45 if the budget is the constraint, or if you travel with a laptop in a personal item and need the cups to fold. Anker is also the only one of the two publishing a price, which is the only reason we can score it on value at all.
Buy neither if the goal is sleep. Both are heavy, bulky objects that solve the wrong half of cabin noise.

Every pick, with the working

Each entry below shows the published inputs, the four axis scores they produce, and what you give up. The order is the computed order, not a commercial one.

1 · Long-haul flights where you would rather not carry a charger for the headphones

Sony WH-1000XM5 Noise-Cancelling Headphones

0.0

251 g and a published 30 hours with noise cancelling on — enough for a transatlantic round trip on one charge, which is the only battery figure that matters on a plane.

Published size: Not published
Weight: 0.55 lb
Capacity: Not published
Weight per liter: Not published
Cost per covered year: Not published
Published list price: Not published

Warranty No warranty term published in the specifications we compiled

Fits No published dimensions to check.

What it does well

251 g published — the lightest over-ear in this comparison by 44 g
Up to 30 h with noise cancelling on covers any single flight on earth
3 minutes of charge yields 3 hours of playback with a USB-PD adapter

What you give up

Sony publishes no warranty term in the specification sheet we compiled
The case does not fold flat, so it takes real volume in a personal item
No manufacturer-published price

The arithmetic behind the score

Value not scored — No manufacturer-published price, so this axis is not scored.
Airline-fit breadth not scored — No published dimensions to check against carrier limits.
Carry efficiency not scored — No published capacity, so weight per liter cannot be computed.
Warranty & support 0.0/10 — no published term (0 of 6); no published repair route (+0); airline damage not covered (+0)

Weights and breakpoints are published on how we rank. Where an input is not published, that axis is dropped and the remaining weights are re-normalized.

$198.00 · Check on Amazon#ad How we earn

Specs: Sony published specifications, compiled 3 September 2026. Retail-channel pricing only. Check the live price before buying.

2 · Multi-leg trips where charging the headphones is an annoyance

Soundcore Space Q45 Noise-Cancelling Headphones

0.0

Skip this one. Not the answer if bulk is your constraint. Its published 50 hours with noise cancelling on is genuinely the longest figure in our ledger, and it stops mattering the moment you clear a single flight - the Sony's 30 hours already covers any leg on earth. What the Space Q45 charges for it is 295 g, 44 g more than the Sony and the heaviest thing on your head in this ledger. Where it wins outright is that Anker publishes a $149 price and Sony publishes none.

A published 50 hours with noise cancelling on is 20 more than the Sony, which is the difference between charging once a trip and not thinking about it at all.

Published size: Not published
Weight: 0.65 lb
Capacity: Not published
Weight per liter: Not published
Cost per covered year: Not published
Published list price: $149

Warranty No warranty term published in the specifications we compiled

Fits No published dimensions to check.

What it does well

Up to 50 h with noise cancelling on, published — the longest here by a wide margin
$149 published price against premium models that publish none
Cups pivot and retract, so it packs flatter than the Sony

What you give up

295 g is 44 g heavier than the Sony
No published warranty term
40 mm drivers and Bluetooth 5.3 are specs, not a sound-quality claim — we have not listened to either

The arithmetic behind the score

Value not scored — No published warranty term or capacity to divide the price by.
Airline-fit breadth not scored — No published dimensions to check against carrier limits.
Carry efficiency not scored — No published capacity, so weight per liter cannot be computed.
Warranty & support 0.0/10 — no published term (0 of 6); no published repair route (+0); airline damage not covered (+0)

Weights and breakpoints are published on how we rank. Where an input is not published, that axis is dropped and the remaining weights are re-normalized.

$99.99 · Check on Amazon#ad How we earn

Specs: Soundcore published specifications, compiled 3 September 2026.

Prices last verified October 7, 2026. Prices move — the figure you see on Amazon at the moment you click is the real one.

Common questions

Sony WH-1000XM5 or Soundcore Space Q45 for flying?

The Sony, if the headphone stays on your head for a long flight: it publishes 251 g against 295 g, and a 3-minute charge for 3 hours of playback. The Space Q45 if price is the constraint or you need cups that fold flat into a personal item — and it is the only one of the two publishing a price, at $149.

Is 50 hours of battery better than 30 for a flight?

Barely. The longest scheduled commercial flight in service is under 19 hours, so Sony’s published 30 hours already covers any single leg plus the terminals either side. Anker’s extra 20 hours buys the return leg without charging, which is convenient rather than decisive.

Does the Soundcore Space Q45 have bigger drivers than the Sony?

Yes — Anker publishes 40 mm against Sony’s 30 mm — and it does not tell you which sounds better. Driver diameter is not a quality measure; tuning, housing and the cancellation algorithm matter far more and none of them is published as a number by either maker.

Which one packs smaller?

The Space Q45. Anker publishes that its cups pivot and retract; Sony’s case does not fold flat. In a personal item measured against United’s published 17 × 10 × 9 in box, a rigid case competes with your laptop for the same flat space.

Do either of these come with a warranty?

Neither publishes a term in the specification sheets we compiled. That is unusual at these prices and it applies equally to both, so it does not separate them — but it does mean neither can be scored on our warranty axis from published data.

Will either work with the in-flight entertainment screen?

Not on their own. A seat-back system needs a Bluetooth transmitter plugged into the aircraft’s headphone jack. The two transmitters we track are covered on the airplane Bluetooth adapter page.