Flights Chicago → San Diego
As of November 2026, economy flights from Chicago to San Diego have a typical range USD 447–1574, median USD 579. Full range across all 156 offers: USD 417–3162. We found 32% of 156 offers from budget carriers (around USD 526) and 68% from full-service carriers (around USD 579).
Preview snapshot — prices change. Search for live results.
Data collected by LetsFG's multi-source price checks — every airline and the major booking sites checked for this route. How we collect data →
Best offers by airline: Chicago → San Diego
Based on 156 offers · November 2026. Prices and availability change — run a live search to confirm.
Bag & seat fees: Chicago → San Diego
Add-on pricing from the cheapest available offer per airline · November 2026 · USD
| Airline | Carry-on | Checked bag | Seat selection |
|---|---|---|---|
| United | Included | USD 35 | — |
| Southwest | Included | Included | — |
| Alaska | — | USD 90 | — |
| Alaska Airlines | Included | USD 35 | — |
| American Airlines | Included | USD 35 | — |
Fees are estimates from the prices we checked and may not reflect your specific itinerary, booking class, or payment method. Run a live search for exact pricing.
How much do flights from Chicago to San Diego cost?
Based on 156 offers · November 2026
Chicago to San Diego flights ranged from USD 417 to USD 3162 across 156 offers analyzed in November 2026. Two fare clusters detected: budget fares around 554 and premium fares around 1652 The chart below shows how prices distributed across all 156 offers.
These 156 offers (November 2026) span multiple departure dates and booking windows — your travel dates may fall anywhere in this distribution. Only a live search shows where your specific trip lands.
50% of offers priced between USD 478 and USD 786
What hidden fees do Chicago to San Diego flights charge?
Ancillary fees — bags, seat selection, and payment surcharges — can add 10–25% to the base fare on Chicago to San Diego routes. The breakdown below is based on 156 offers analyzed in November 2026.
| Carrier | Avg fee (USD) | % of base fare |
|---|---|---|
| UA | 34 | 3% |
| WN | 35 | 6% |
| Alaska | 90 | 19% |
| AS | 26 | 4% |
| AA | 66 | 10% |
Alaska: base ~USD 387 + fees USD 90 = ~USD 477 total. Alaska Airlines: base ~USD 726 + fees USD 26 = ~USD 752 total.
Alaska's USD 90 ancillary fees narrow the gap with Alaska Airlines's lower-fee model — the USD 339 base difference shrinks to USD 275 after fees. Always compare total cost, not just the advertised base fare.
Estimates based on median total minus average ancillary fee. Actual base fares vary by itinerary.Fee levels vary significantly across carriers on this route — some carriers charge 50%+ above the base fare in ancillary fees.
Run your search to see itemized fees for your itineraryWhich airline is cheapest from Chicago to San Diego?
5 airlines flew Chicago to San Diego in this dataset. The route shows a clear split between low-cost and full-service carriers. Knowing the airline isn't enough — the typical fare range below shows how far prices swing on each one. Median and range include all fees we recorded.
Even on the cheapest airline (Alaska), fares ranged USD 447–501 in this snapshot. Your exact price depends on your dates and how far ahead you book — run a live search to see your number →
| Airline | Offers | Typical range (USD) | Median (USD) | Fees (USD) |
|---|---|---|---|---|
 Alaska | 9 | 447–501 | 477 | 90 (19%) |
 Southwest Airlines | 41 | 439–786 | 526 | 35 (7%) |
 American Airlines | 37 | 547–937 | 579 | 66 (11%) |
 United Airlines | 52 | 448–2014 | 581 | 34 (6%) |
 Alaska Airlines | 17 | 466–809 | 752 | 26 (4%) |
Where do the best Chicago → San Diego prices come from?
We checked direct airlines, travel agencies, and meta-search for this route. On this route the lowest median came from meta-search sources, but the cheapest channel shifts by route and date — which is exactly why a live search across all of them wins.
We compare every airline and the major booking sites but never disclose which — that's our edge. Prices are the ones we observed and aren't official data from any platform. Run a live search and we bring you the cheapest, wherever it is.
Key facts: Chicago to San Diego flights
- Full-service carriers on Chicago–San Diego cost 1.1x more than budget airlines (USD 597 vs USD 526 median; overall median USD 579).
- Alaska charges 3.4x more in ancillary fees than AS — USD 90 vs USD 26 avg per booking.
- The same route priced USD 466 apart depending on where it was booked — the lowest median was USD 448. We search every airline and the major booking sites at once so you always see that lowest price.
Frequently asked questions
- How much does a flight from Chicago to San Diego cost?
- Based on 156 offers analyzed, Chicago to San Diego flights range from USD 417 to USD 3162, with a median price of USD 579. Search for your specific dates →
- What hidden fees should I expect on Chicago to San Diego flights?
- On average, ancillary fees (bags, seat selection) add USD 44 to the base fare on Chicago to San Diego flights. See itemized fees for your itinerary →
- Which airline is cheapest on Chicago to San Diego including all fees?
- Alaska has the lowest median fare on Chicago to San Diego at USD 477 (median across 9 offers in our snapshot). Check which airline wins on your dates →
- Which booking site has the cheapest Chicago–San Diego flights?
- It depends on your dates — no single site is always cheapest. We search every airline and the major booking sites at once (travel agencies and meta-search included) and surface whichever is lowest; the best median in this snapshot was USD 448. Run a live search and we'll find the cheapest for you →
- Why do prices vary so much on Chicago to San Diego routes?
- Chicago to San Diego has 5 airlines competing, creating a price range from USD 417 to USD 3162 across 156 offers. There are two distinct fare clusters on this route: budget options and premium fares. Find where your trip lands in the distribution →
5 airlines, two price clusters — find which fits your budget
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