Since Sliceback did me a great favor and posted the AA End of 2018 base/equipment seniority he asked me to post some of the data I have gathered recently.
All numbers are based off those available on public websites as I don't work for any of the Legacy airlines. If someone has more accurate numbers of retirements, particularly for post 2040, please pass them along. As far as I can tell I'm missing retirement dates for 640 pilots for AA and 577 for DL. As such, they are currently all showing to retire post 2050 which we know not to be true.
Assumptions:
-Hired 1/1/2019
-Retire 12/31/2050
-No growth, percentage based off current number of pilots
-Every pilot stays until age 65 (no early retirements)
-Seniority number would be as of end of year
AA
2020 - 13780 - 91%
2025 - 9300 - 61.3%
2030 - 5720 - 37.8%
2035 - 3350 - 22.2%
2040 - 2200 - 14.5%
2045 - 1400 - 9.3%
2050 - 750 - 4.9%
As far as the numbers I have only 105 pilots will retire post 2050, thus missing dates for 640 pilots.
UAL
2020 - 11860 - 94%
2025 - 9400 - 74.7%
2030 - 6070 - 48.2%
2035 - 3530 - 28.1%
2040 - 1850 - 14.7%
2045 - 780 - 6.2%
2050 - 170 - 1.4%
DL
2020 - 13000 - 92.8%
2025 - 9100 - 65%
2030 - 6400 - 45.6%
2035 - 4400 - 31.3%
2040 - 3160 - 22.6%
2045 - 1800 - 12.9%
2050 - 790 - 5.6%
Again, I only show 187 pilots retiring post 2050 so dates for 577 pilots are missing.
Obviously, not everyone will stay to 65 so theses numbers can/will be accelerated.