I'm a big fan of quantitative data for these types of matters. Thanks to our tax dollars, the Bureau of Transportation Statistics tracks this data and we have access to it. I've compiled some relevant statistics by year between 2012 and 2017.
Percent Flights Late - JetBlue
- 2012: 19.63%
- 2013: 24.48%
- 2014: 21.86%
- 2015: 22.16%
- 2016: 23.41%
- 2017: 25.63%
Average Arrival Delay (in minutes) for All Flights - JetBlue
- 2012: 4.85
- 2013: 9.12
- 2014: 6.91
- 2015: 6.67
- 2016: 8.05
- 2017: 10.97
Average Arrival Delay (in minutes) for Only Late Flights - JetBlue
- 2012: 61.66
- 2013: 60.88
- 2014: 59.24
- 2015: 61.00
- 2016: 64.32
- 2017: 72.38
JetBlue does appear to be trending towards poorer performance. For comparison, here are Southwest numbers:
Percent Flights Late - Southwest
- 2012: 15.87%
- 2013: 22.37%
- 2014: 25.47%
- 2015: 18.75%
- 2016: 17.75%
- 2017: 19.80%
Average Arrival Delay (in minutes) for All Flights - Southwest
- 2012: 2.88
- 2013: 7.24
- 2014: 9.92
- 2015: 4.37
- 2016: 3.90
- 2017: 5.04
Average Arrival Delay (in minutes) for Only Late Flights - Southwest
- 2012: 48.74
- 2013: 46.06
- 2014: 51.35
- 2015: 52.28
- 2016: 50.12
- 2017: 48.84
Here, you can see that both airlines had an increase in delayed flights between 2016 and 2017: 2.22% for JetBlue and 2.05% for Southwest. But, if you were delayed, the length of delay was shorter on Southwest. I'd argue that one of the reasons why Southwest handles delays quicker is what
kaytieeldr notes: they have more planes.
Data Source:
https://www.transtats.bts.gov/ONTIME/Airline.aspx
Spreadsheet (csv format) compiling data for American, Delta, Frontier, JetBlue, Southwest, Spirit, and United:
http://my-content-locker.com/temp/flightdelays-byairline-2012to2017.csv
Note: Data for American, Delta, and United is for mainline flight only. Regional carriers are tracked separated by the Bureau of Transportation Statistics. If you fly out of a smaller airport, you may be flying on a regional carrier like SkyWest. SkyWest operates regional flights for American (as American Eagle), Delta (as Delta Connection), and United (as United Express). Typically, regional carriers tend to have poorer on-time records when compared to mainline flights.