domestic · 3h 40m · 2,690 km
Seattle to Dallas
4 airlines · 4 aircraft ranked
In economy, Alaska's Main Cabin (737-900ER) leads the field with a 4.4/10.In first class, Alaska's First Class (737-900ER) edges out the field with a 2.8/10.
Quick pick
Fly Alaska. It scores higher across seat comfort and amenities.
If prices are similar, go with this one.
Fly Alaska. It has 3 more inches of legroom.
If fares are comparable, this is the better cabin.
Select two airlines to compare head-to-head
Data verified June 2026
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Airlines on this route
Flying with family
- Seatback screens on Alaska, Delta. American, Frontier: bring your own device.
- Most legroom: Alaska (31"). Least: Frontier (28"). That 3" difference matters with kids.
Route insights
- In economy, Alaska's Main Cabin (737-900ER) leads the field with a 4.4/10.
- In first class, Alaska's First Class (737-900ER) edges out the field with a 2.8/10.
Frequently asked
Which is better in first: Alaska or Delta on SEA-DFW?
First Class (Alaska Airlines, 737-900ER) and Delta First Class (Delta Air Lines, 737-900ER) score virtually the same in first: 2.8 vs 2.8/10. The biggest gap is entertainment — a 11" screen vs 9" screen — but neither carrier pulls ahead overall.
Which is better in economy: Alaska or Delta on SEA-DFW?
Main Cabin (Alaska Airlines, 737-900ER) edges out Main Cabin (Delta Air Lines, 737-900ER) in economy, scoring 4.4/10 vs 3.5. The deciding factor: 31" of pitch vs 30".
Which is better in first: Alaska or American on SEA-DFW?
First Class (Alaska Airlines, 737-900ER) and First Class (American Airlines, A321neo) score virtually the same in first: 2.8 vs 2.5/10. The biggest gap is entertainment — a 11" screen vs app_only — but neither carrier pulls ahead overall.
Which is better in economy: Alaska or American on SEA-DFW?
Main Cabin (Alaska Airlines, 737-900ER) edges out Main Cabin (American Airlines, A321neo) in economy, scoring 4.4/10 vs 3.7. The deciding factor: a 10" screen vs app_only. American Airlines fights back on seat width.
Which is better in economy: Alaska or Frontier on SEA-DFW?
Main Cabin (Alaska Airlines, 737-900ER) dominates Economy (Frontier Airlines, A320neo) in economy, scoring 4.4/10 vs 2.2. The deciding factor: 31" of pitch vs 28". Frontier Airlines fights back on seat width.
Which is better in first: Delta or American on SEA-DFW?
Delta First Class (Delta Air Lines, 737-900ER) and First Class (American Airlines, A321neo) score virtually the same in first: 2.8 vs 2.5/10. The biggest gap is entertainment — a 9" screen vs app_only — but neither carrier pulls ahead overall.
Which is better in economy: Delta or American on SEA-DFW?
Main Cabin (Delta Air Lines, 737-900ER) and Main Cabin (American Airlines, A321neo) score virtually the same in economy: 3.5 vs 3.7/10. The biggest gap is entertainment — a 9" screen vs app_only — but neither carrier pulls ahead overall.
Which is better in economy: Delta or Frontier on SEA-DFW?
Main Cabin (Delta Air Lines, 737-900ER) beats Economy (Frontier Airlines, A320neo) in economy, scoring 3.5/10 vs 2.2. The deciding factor: a 9" screen vs none. Frontier Airlines fights back on seat width.
Which is better in economy: American or Frontier on SEA-DFW?
Main Cabin (American Airlines, A321neo) beats Economy (Frontier Airlines, A320neo) in economy, scoring 3.7/10 vs 2.2. The deciding factor: 30" of pitch vs 28".
What are the best seats in Alaska First Class on SEA-DFW?
Best: Row 1 for maximum legroom. Window seats in rows 1-2 are quiet and private. Avoid: Row 4 (last row of first) may have limited meal choices due to service order. 41-inch pitch is among the best domestic first class products in the US. No seatback IFE screens; stream to personal devices via Gogo 2Ku Wi-Fi. USB-A and AC outlet under center armrest. Free for T-Mobile customers. Pre-order meals system with limited choices.
What are the best seats in Alaska Main Cabin on SEA-DFW?
Best: Exit row seats (row 15/16) offer extra legroom. Avoid: Last row (34) has limited recline and is near the lavatory. Middle seats throughout. Standard domestic economy with 31-inch pitch. USB-A and AC power at every seat. No seatback screens; entertainment streams to personal devices. Boeing Sky Interior with larger overhead bins. Exit row seats on the 737 offer extra legroom but do not recline. The row immediately before the exit also has limited recline due to clearance requirements.
What are the best seats in Delta Delta First Class on SEA-DFW?
Best: Row 1 bulkhead has the most legroom. 1A and 1D for window-seat privacy. Avoid: Row 5 is closest to the Comfort+ cabin. B and C seats are more exposed. Pre-retrofit 737-900ER with older recliner seats. Smaller 9-inch seatback IFE screens. AC outlet and USB-A at every seat. Delta Sync free WiFi. Same meal service as other domestic First Class.
What are the best seats in Delta Main Cabin on SEA-DFW?
Best: Comfort+ rows 10-14 (27 seats) offer 33-34 inches of pitch with complimentary beer/wine/spirits. Row 10 bulkhead for the most legroom. Avoid: Last rows near rear lavatory. Middle seats (B, E) throughout. Row 37 does not recline. 27 Comfort+ seats in rows 10-14 with 33-34-inch pitch; 133 Main Cabin seats in rows 15-37 with 30-31 inches. Older slimline seats with 9-inch seatback screens. USB-A at most seats; AC outlets inconsistent — some rows have them, others do not. Delta Sync free WiFi. Some 737-900ER sub-variants (73J, 73R) may lack seatback IFE or WiFi.
What are the best seats in American First Class on SEA-DFW?
Best: Row 1A and 1L are farthest from the galley and offer the most privacy. All seats have direct aisle access in the 1-1 layout. Avoid: Row 5 is closest to the business class cabin and may experience some noise from the galley area between cabins. Only 10 suites total on this narrowbody. The 1-1 configuration is unique for a single-aisle aircraft. Sliding doors on all suites. This fleet is being phased out as the A321XLR enters service.
What are the best seats in American Main Cabin on SEA-DFW?
Best: Rows 11-16 are designated Main Cabin Extra with 35 inches of pitch. Row 11 bulkhead has the most legroom. Exit row offers additional space. Avoid: Last row (22) has limited recline and is near the rear lavatory. Middle seats (B and E) are least desirable. Half of the economy cabin (36 seats) is Main Cabin Extra with additional pitch. Seatback IFE screens with live TV in all economy seats. Only 72 economy seats total, making this a very premium-heavy narrowbody configuration. Exit row seats on the A320/A321 family offer extra legroom but do not recline. The row immediately before the exit also has limited recline due to clearance requirements.
What are the best seats in Frontier Economy on SEA-DFW?
Best: Exit row seats for extra legroom without paying for Stretch. Avoid: Last row has no recline and lavatory proximity. All middle seats are uncomfortable at 28-inch pitch. 28-inch pitch ties Spirit for the tightest in the US industry. No wifi, no power outlets, no seatback screens, no streaming entertainment. Tray tables are approximately 50% smaller than standard. All food and beverages are buy-on-board. Individual air nozzles and overhead reading lights are available. Exit row seats on the A320/A321 family offer extra legroom but do not recline. The row immediately before the exit also has limited recline due to clearance requirements.