transatlantic · 7h 40m · 5,900 km
Chicago to Dublin
3 airlines · 3 aircraft ranked
In business class, Aer Lingus's Business Class (A330-300) edges out the field with a 7.1/10.In premium economy, United's Premium Plus (767-300ER) leads the field with a 5.3/10.
Quick pick
Fly Aer Lingus. It has a wider seat (22" vs 20.6").
If fares are comparable, this is the better cabin.
Fly United. It has free Wi-Fi (paid on American).
If fares are comparable, this is the better cabin.
Fly Aer Lingus. It scores higher across seat comfort and amenities.
If prices are similar, go with this one.
Select two airlines to compare head-to-head
Data verified June 2026
Find your flight
New routes and airlines added regularly. One short email when we do.
Airlines on this route
Route insights
- In business class, Aer Lingus's Business Class (A330-300) edges out the field with a 7.1/10.
- In premium economy, United's Premium Plus (767-300ER) leads the field with a 5.3/10.
- In economy, Aer Lingus's Economy (A330-300) edges out the field with a 4.6/10.
Frequently asked
Which is better in business: United or Aer Lingus on ORD-DUB?
Polaris Business (United Airlines, 767-300ER) and Business Class (Aer Lingus, A330-300) score virtually the same in business: 6.9 vs 7.1/10. The biggest gap is seat width — 22"-wide seats vs 20.6" — but neither carrier pulls ahead overall.
Which is better in economy: United or Aer Lingus on ORD-DUB?
Economy (United Airlines, 767-300ER) and Economy (Aer Lingus, A330-300) score virtually the same in economy: 4.5 vs 4.6/10. The biggest gap is power — AC + USB-C vs USB-A only — but neither carrier pulls ahead overall.
Which is better in business: United or American on ORD-DUB?
Polaris Business (United Airlines, 767-300ER) edges out Flagship Business (American Airlines, 787-8) in business, scoring 6.9/10 vs 6.3. The deciding factor: AC + USB-C vs no power. American Airlines fights back on legroom and seat width.
Which is better in premium economy: United or American on ORD-DUB?
Premium Plus (United Airlines, 767-300ER) edges out Premium Economy (American Airlines, 787-8) in premium economy, scoring 5.3/10 vs 4.4. The deciding factor: AC + USB-C vs no power. American Airlines fights back on seat width.
Which is better in economy: United or American on ORD-DUB?
Economy (United Airlines, 767-300ER) edges out Main Cabin (American Airlines, 787-8) in economy, scoring 4.5/10 vs 3.8. The deciding factor: Free Wi-Fi vs Paid Wi-Fi.
Which is better in business: Aer Lingus or American on ORD-DUB?
Business Class (Aer Lingus, A330-300) edges out Flagship Business (American Airlines, 787-8) in business, scoring 7.1/10 vs 6.3. The deciding factor: AC + USB-C vs no power. American Airlines fights back on legroom and bed length.
Which is better in economy: Aer Lingus or American on ORD-DUB?
Economy (Aer Lingus, A330-300) edges out Main Cabin (American Airlines, 787-8) in economy, scoring 4.6/10 vs 3.8. The deciding factor: AC + USB-C vs no power. American Airlines fights back on seat width.
What are the best seats in United Polaris Business on ORD-DUB?
Best: Odd-numbered window rows offer the best privacy since they sit farther from the aisle. 11L has great privacy with two windows. 18A is the most secluded seat but lacks a window. Solo travelers should pick A or L positions. Avoid: Seat 1A is reserved as pilot crew rest on transatlantic flights, leaving 45 sellable seats. Row 7 and row 18 have only one window instead of the typical two. 18L has no window at all despite being a window position. Front rows experience more crew traffic. The 1-1-1 layout is unique to the 767's narrower fuselage. All seats have direct aisle access. No doors but staggered layout provides good privacy. 24 aircraft operate this high-J configuration. Panasonic Ku-band WiFi; Starlink retrofit in progress fleet-wide through 2027. Rows 13-14 are skipped in numbering.
What are the best seats in United Premium Plus on ORD-DUB?
Best: Row 20 offers extra legroom as the bulkhead row. Window pairs (A-B and K-L) work well for couples. Avoid: Row 23 is the last row and closest to the economy cabin. Center seats (D-E) in the 2-2-2 layout offer less privacy. Small 22-seat cabin with six-abreast seating, unusual for premium economy. Collins MiQ seats with adjustable headrests and footrests. Complimentary meal service with wine and spirits. Separate lavatory access from economy.
What are the best seats in United Economy on ORD-DUB?
Best: Row 37 is the first economy row and benefits from proximity to lavatories without being right next to them. Aisle seats (C, D, G, H) are easiest for getting up on long flights. Avoid: Row 44 (last row) seats 44DEF and 44KL cannot recline due to the rear galley and lavatory wall. Avoid 44E (center middle) at all costs on transatlantic flights. Only 56 standard economy seats on this high-J configuration, one of the smallest economy cabins on any widebody. The 2-3-2 layout on the 767 is notably more comfortable than 3-3-3 on 787s or 3-4-3 on 777s. Complimentary meals on transatlantic routes.
What are the best seats in Aer Lingus Business Class on ORD-DUB?
Best: Throne seats at 2A, 4A, 2K, 4K (window seats in even rows) have the largest personal space and best privacy in a staggered layout. Avoid: Paired center seats in odd rows (1D/E, 3D/E, 5D/E) share space and one passenger has to climb over the other. Row 7 is the last row with galley behind. Staggered layout alternating between 1-2-1 and 1-2-2 rows. Thompson Vantage lie-flat seats with 77-inch beds and 22-inch width. 16-inch HD Panasonic eX2 touchscreens. AC outlet and USB-A at every seat. Starlink WiFi rolling out across the A330 fleet (free, up to 500 Mbps on equipped aircraft; older Panasonic system on others). Jo Browne Ireland amenity kit. White linen tablecloth dinner service with Irish-inspired seasonal menu. AA Admirals Club access at US airports.
What are the best seats in Aer Lingus Economy on ORD-DUB?
Best: Window pairs (A/B and J/K) avoid the center quad. Exit row seats for extra legroom. Avoid: Inner center seats (D, E, F, G) in the 2-4-2 layout. Last rows near rear galley. 283 economy seats in a 2-4-2 widebody layout with 31-inch pitch. 9-inch Panasonic eX2 seatback screens. AC outlet shared between pairs plus USB-A per seat. Starlink WiFi rolling out (free on equipped aircraft; paid on older Panasonic system). Complimentary hot meal and pre-landing snack with two free alcoholic drinks during dinner. Pillow and blanket provided.
What are the best seats in American Flagship Business on ORD-DUB?
Best: Forward-facing window seats for privacy. Avoid: Rear-facing seats feel narrower due to fixed armrests. Adjacent seats share a structural base — movement transfers. Safran Concept D in alternating forward/rear-facing 1-2-1. AA's weakest widebody business product. B&O headphones. Casper duvet (no mattress pad). Panasonic satellite wifi (paid, slow). Pre-orderable meals.