domestic · 3h 50m · 2,870 km
Seattle to Austin
3 airlines · 3 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. Southwest: bring your own device.
- Most legroom: Southwest (32"). Least: Delta (30"). That 2" 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-AUS?
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-AUS?
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 economy: Alaska or Southwest on SEA-AUS?
Main Cabin (Alaska Airlines, 737-900ER) edges out Economy (open seating) (Southwest Airlines, 737-800) in economy, scoring 4.4/10 vs 3.9. The deciding factor: a 10" screen vs app_only. Southwest Airlines fights back on legroom.
Which is better in economy: Delta or Southwest on SEA-AUS?
Economy (open seating) (Southwest Airlines, 737-800) edges out Main Cabin (Delta Air Lines, 737-900ER) in economy, scoring 3.9/10 vs 3.5. The deciding factor: 32" of pitch vs 30". Delta Air Lines fights back on entertainment.
What are the best seats in Alaska First Class on SEA-AUS?
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-AUS?
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-AUS?
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-AUS?
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 Southwest Economy (open seating) on SEA-AUS?
Best: 16A and 16F have the most legroom (no seat in front, behind exit row). Row 12 exit row seats also have extra legroom. Avoid: Last row (row 29) is narrower, restricted recline, near galley/lavatory noise. Seats 10A, 11A, 11F lack windows. Single-class cabin. Assigned seating launched Jan 2026. Extra legroom rows at front have ~34 inch pitch. Older 737-800s lack power outlets; newer retrofits have USB-A and USB-C in seatbacks. Streaming entertainment via personal devices only. 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.