Routes/Chicago, IL to San Diego, CA

Chicago, IL to San Diego, CA

Average one-way fare in 2026 Q1: $226 · 1728 nonstop miles · 1954 passengers per day.

2026 Q1 fare$226

2025 Q1 fare$307

Change−$81

Passengers/day1954

Distance1728 mi

The average fare a year earlier (2025 Q1) was $307. The change is $81 lower (26.5%).

The largest carrier on this route in 2026 Q1 was United with 37% of passengers. The lowest-fare carrier was Alaska with 20% of passengers, at an average fare of $183.

All routes from Chicago, IL · All routes from San Diego, CA

All quarters on this route

Quarter	Passengers/day	Avg. fare	Largest carrier	Largest share	Lowest-fare carrier
2024 Q1	1429	$301	United	40%	Southwest
2024 Q2	1920	$279	United	39%	Southwest
2024 Q3	1966	$272	United	38%	Southwest
2024 Q4	1863	$289	United	44%	Southwest
2025 Q1	1358	$307	United	43%	Southwest
2025 Q2	1888	$268	United	37%	Southwest
2025 Q3	2271	$217	United	34%	Southwest
2025 Q4	2152	$217	United	35%	Alaska
2026 Q1	1954	$226	United	37%	Alaska

Source: U.S. Department of Transportation, Consumer Airfare Report Table 1, 2026 Q1. Figures are average one-way fares paid, including taxes and fees, for the quarter shown. Record: city markets 30977 and 33570; U.S. Department of Transportation, Domestic Airline Consumer Airfare Report, Table 1: top 1,000 contiguous-state city-pair markets (average one-way fare, passengers per day, largest carrier, lowest-fare carrier). Fetched 2026-09-27T00:40:04Z. Source data.