Is Aer Lingus or KLM better to Europe?

KLM scores 7.5/10 against Aer Lingus at 7/10 on seat, screens, lounge and fare. On the four dimensions we can verify, Aer Lingus wins 1 and KLM wins 1. Service and food are not scored here because they cannot be read off a spec sheet.

Which is cheaper, Aer Lingus or KLM?

On the 41 routes where both were priced for the same week (November 8–14, 2026), Aer Lingus was cheaper on 27 and KLM on 14. Every pair of fares is the same departure and return date in the same cabin, so the difference is the airline rather than the dates or the cabin.

Does the aircraft change the answer?

Yes. KLM scores 10/10 on the 787-9 / 787-10 / 777 (World Business Class) and 5/10 on the A330-200 / A330-300. Check the equipment on your date before deciding.

Has Jon flown either of these?

Neither, so this page is product facts and fares only. Any review we publish of either will be labeled Researched until that changes.

Head to head

Aer Lingus vs KLM

KLM scores 7.5/10 against Aer Lingus at 7/10 on seat, screens, lounge and fare.

By Jon Miksis · cabin data verified August 30, 2026 · fares for travel November 8–14, 2026

Best product each one flies

Scored on what can be verified. Service, food and ground recovery are absent deliberately: they need someone in the seat, and they live in the reviews rather than here.

One caveat on the Value line, stated rather than buried: Value is computed from business fares, and a carrier with too few of them does not get a Value score at all. Where you see a dash, we have fewer than three priced business routes for that airline and did not want to invent a figure from one or two — so its product score is the mean of three dimensions rather than four, and it is not directly comparable to a score built on hundreds of fares. The airlines with the most fares behind them are named on the business-class ranking, and where each of these two sits among every carrier we price, on seat and on fare, is on The Best Airlines to Fly to Europe.

Aer Lingus

A330-300

Seat: 5/10
IFE: 8/10
Lounge & bags: 10/10
Value: 5/10
Product score: 7/10

KLM

787-9 / 787-10 / 777 (World Business Class)

Seat: 10/10
IFE: 8/10
Lounge & bags: 10/10
Value: 2/10
Product score: 7.5/10

Where they actually differ

Seat: KLM
5/10 on the A330-300 against 10/10 on the 787-9 / 787-10 / 777 (World Business Class).
Value: Aer Lingus
Median premium over the cheapest carrier on the same route: 5/10 against 2/10.

Level on IFE and lounge & bags

As almost every pair is. Of the 31 business cabins we have verified, 28 score 8 on screens and power and 29 score 10 on lounge and bags — because those two dimensions describe what a business fare includes rather than which airline sold it to you. Lounge access, two checked bags and a carry-on are close to the definition of the cabin.

The one genuine differentiator on screens is free wifi, and only Delta and JetBlue offer it. Seat and Value are where carriers separate, which is why they lead this page.

Where both were priced on the same dates

Every fare is November 8–14, 2026, so a difference between two rows is a difference between two airlines and nothing else. These are economy fares, while the cabin scores above describe the business product — read them as how each airline prices against its competitors, not as what its business seat costs.

Route	Cabin	Aer Lingus	KLM	Cheaper
JFK → BER	economy	$660	$1049	Aer Lingus by $389
JFK → DUB	economy	$680	$662	KLM by $18
BOS → CDG	economy	$718	$750	Aer Lingus by $32
BOS → AMS	economy	$748	$1226	Aer Lingus by $478
JFK → ZRH	economy	$764	$1655	Aer Lingus by $891
JFK → AMS	economy	$772	$1181	Aer Lingus by $409
JFK → GLA	economy	$773	$840	Aer Lingus by $67
ORD → BOD	economy	$1280	$814	KLM by $466
BOS → BER	economy	$836	$958	Aer Lingus by $122
BOS → EDI	economy	$852	$850	KLM by $2
JFK → EDI	economy	$921	$850	KLM by $71
BOS → GLA	economy	$895	$890	KLM by $5
SFO → GLA	economy	$1238	$939	KLM by $299
MIA → BOD	economy	$1268	$945	KLM by $323
LAX → AMS	economy	$959	$1362	Aer Lingus by $403
MIA → EDI	economy	$1204	$1026	KLM by $178
ORD → EDI	economy	$1234	$1035	KLM by $199
SFO → EDI	economy	$1427	$1046	KLM by $381
SFO → MAN	economy	$1414	$1060	KLM by $354
IAD → GLA	economy	$1084	$1373	Aer Lingus by $289
JFK → PRG	economy	$1117	$1256	Aer Lingus by $139
IAD → AMS	economy	$1163	$1291	Aer Lingus by $128
ORD → AMS	economy	$1172	$1292	Aer Lingus by $120
IAD → MAN	economy	$1226	$1262	Aer Lingus by $36
IAD → EDI	economy	$1292	$1305	Aer Lingus by $13
SFO → AMS	economy	$1370	$1361	KLM by $9
IAD → BOD	economy	$2156	$1711	KLM by $445
BOS → GLA	business	$4770	$7580	Aer Lingus by $2810
JFK → ZRH	business	$5073	$11760	Aer Lingus by $6687
ORD → AMS	business	$5379	$12201	Aer Lingus by $6822
IAD → AMS	business	$5762	$12081	Aer Lingus by $6319
ORD → BER	business	$5798	$10237	Aer Lingus by $4439
ORD → EDI	business	$5798	$8987	Aer Lingus by $3189
IAD → BER	business	$5820	$10937	Aer Lingus by $5117
ORD → GLA	business	$6520	$10278	Aer Lingus by $3758
IAD → GLA	business	$7234	$7569	Aer Lingus by $335
MIA → EDI	business	$7665	$7887	Aer Lingus by $222
JFK → GLA	business	$10212	$7819	KLM by $2393
ORD → BOD	business	$8477	$10818	Aer Lingus by $2341
SFO → AMS	business	$10390	$12461	Aer Lingus by $2071
LAX → AMS	business	$11057	$12451	Aer Lingus by $1394

What happens if the aircraft swaps

Both carriers are paying-the-same-fare-either-way propositions on some frames. The worst product each one flies:

Aer Lingus

A330-300

Seat: 5/10
IFE: 8/10
Lounge & bags: 10/10
Value: 5/10
Product score: 7/10

KLM

A330-200 / A330-300

Seat: 5/10
IFE: 8/10
Lounge & bags: 10/10
Value: 2/10
Product score: 6.3/10

Aer Lingus: A staggered mix of 1-2-1 and 1-2-2 rows, so roughly 90% of seats reach an aisle directly and the paired seats do not. Un-retrofitted ex-Qatar frames are worse again.

KLM: 2-2-2 lie-flat: the window seat requires stepping over a neighbor.

Common questions

Is Aer Lingus or KLM better to Europe?: KLM scores 7.5/10 against Aer Lingus at 7/10 on seat, screens, lounge and fare. On the four dimensions we can verify, Aer Lingus wins 1 and KLM wins 1. Service and food are not scored here because they cannot be read off a spec sheet.
Which is cheaper, Aer Lingus or KLM?: On the 41 routes where both were priced for the same week (November 8–14, 2026), Aer Lingus was cheaper on 27 and KLM on 14. Every pair of fares is the same departure and return date in the same cabin, so the difference is the airline rather than the dates or the cabin.
Does the aircraft change the answer?: Yes. KLM scores 10/10 on the 787-9 / 787-10 / 777 (World Business Class) and 5/10 on the A330-200 / A330-300. Check the equipment on your date before deciding.
Has Jon flown either of these?: Neither, so this page is product facts and fares only. Any review we publish of either will be labeled Researched until that changes.

Deal alerts on Aer Lingus and KLM

Aer Lingus or KLM, whichever drops first

Aer Lingus carried a $260 median premium in our grid and KLM $156; the cheaper of the two changes route by route, and neither is cheapest every week. An alert from your airport catches whichever falls under the field, which is a better bet than picking one airline in advance.

I have used Going for six years, and it is how I hear about a fare below the floor before it is gone.

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