Flight Check

Best Airline: SAN to BOS

San Diego to Boston — airline reliability comparison

Delta Air Lines is the most reliable airline on the SAN to BOS route with a 84% on-time rate, compared to Southwest Airlines at 35%. Based on 1,305 flights tracked.

This route involves weather-prone airports, which can affect reliability regardless of airline.

Source: Bureau of Transportation Statistics. Updated October 2026.

On-Time Rate by Airline

Delta Air Lines84%
Alaska Airlines76%
JetBlue Airways73%
Southwest Airlines35%

SAN to BOS Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
Delta Air LinesDLBest84%0.9%67m1,305
Alaska AirlinesAS76%0.7%61m1,573
JetBlue AirwaysB673%1.0%84m2,915
Southwest AirlinesWNWorst35%0.0%72m58

Route Overview

76%
Overall On-Time
76m
Avg Delay
0.9%
Cancel Rate
5,851
Total Flights
SAN to BOS Route DetailsReturn: BOS to SAN
SAN AirportBOS Airport

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Data last updated October 2026. Source: Bureau of Transportation Statistics.