I am so glad you asked!

Best and worst planes for seating space.

So which airlines and specific aircraft within those airlines have the most and least seat pitch? I consulted Seat Guru’s handy comparison charts for some answers.

Excluding United’s Economy Plus seating, here are the top choices:
1. WestJet Boeing 737-800’s 34 inches
2. Air Canada Embraer ERJ-190’s: 34 inches
3. Air Canada CRJ-705’s 34 inches
4. JetBlue Airbus 320’s: 34 inches (38 inches if you pay extra)
5. Frontier Airlines Airbus 318’s and 319’s: 33 inches
6. American Airlines 767’s: 33-34 inches
7. Southwest Airlines 737’s: 32-33 inches

Which have the most cramped seating? Some of the worst are:
1. Northwest Airlines DC9-30: 30 inches
2. US Airways Boeing 737-400’s and Airbus A319’s and A320’s: 30 inches
3. Airtran 717’s: 30 inches
4. USA3000 Airbus A320’s: 30 inches

In fact, the vast majority of commercial jetliners have 31 inches of pitch, with an additional handful offering 32.
If it’s seat width you’re looking for, stick with the aforementioned Midwest Airlines 717’s, and Virgin America’s Airbuses (19.7 inches).
Most other planes have 17-18 inches, according to SeatGuru.
On planes flying international routes, you’ll find similar disparities between airlines.
Most carriers will only give you between 30 and 31 inches of seat pitch, even on long haul flights (no wonder we all arrive in such bad shape).

Among the airlines affording those all important extra inches (all at 32) are Air Canada, Air France, Cathay Pacific, Thai Airways, and Virgin Atlantic.

But if you really want to sit comfortably, Air New Zealand’s 747-400’s, Asiana’s 747-400’s and Emirates’ 777’s offer a whopping 34 inches.

So... now you know!