Flights Chicago → San Diego
As of November 2026, economy flights from Chicago to San Diego have a typical range USD 311–594, median USD 464. Full range across all 56 offers: USD 260–687. We analyzed 56 offers from 6 airlines in a single price check.
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 56 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 |
|---|---|---|---|
| Alaska | — | USD 90 | — |
| Alaska Airlines | Included | USD 35 | — |
| American | — | USD 101 | — |
| American Airlines | Included | USD 35 | — |
| United | 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 56 offers · November 2026
Chicago to San Diego flights ranged from USD 260 to USD 687 across 56 offers analyzed in November 2026. The chart below shows how prices distributed across all 56 offers.
These 56 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 357 and USD 545
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 56 offers analyzed in November 2026.
| Carrier | Avg fee (USD) | % of base fare |
|---|---|---|
| Alaska | 90 | 29% |
| AS | 22 | 4% |
| American | 101 | 29% |
| AA | 45 | 11% |
| UA | 45 | 9% |
American: base ~USD 251 + fees USD 101 = ~USD 352 total. Alaska Airlines: base ~USD 525 + fees USD 22 = ~USD 547 total.
American's USD 101 ancillary fees narrow the gap with Alaska Airlines's lower-fee model — the USD 274 base difference shrinks to USD 195 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.American charges 4.7x more in ancillary fees than AS on this route. Compare total-cost options when booking.
Run your search to see itemized fees for your itineraryWhich airline is cheapest from Chicago to San Diego?
6 airlines flew Chicago to San Diego in this dataset. 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.
| Airline | Offers | Typical range (USD) | Median (USD) | Fees (USD) |
|---|---|---|---|---|
 F9|AA | 1 | — | 260 | n/a |
 Alaska | 5 | 272–357 | 302 | 90 (30%) |
 American | 6 | 319–363 | 352 | 101 (29%) |
 American Airlines | 15 | 336–490 | 407 | 45 (11%) |
 United Airlines | 20 | 463–607 | 527 | 45 (9%) |
 Alaska Airlines | 9 | 273–659 | 547 | 22 (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
- Chicago–San Diego had 56 offers analyzed. Median price: USD 464.
- American charges 4.7x more in ancillary fees than AS — USD 101 vs USD 22 avg per booking.
- The same route priced USD 357 apart depending on where it was booked — the lowest median was USD 260. 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 56 offers analyzed, Chicago to San Diego flights range from USD 260 to USD 687, with a median price of USD 464. 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 51 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?
- F9|AA has the lowest median fare on Chicago to San Diego at USD 260 (median across 1 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 260. 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 6 airlines competing, creating a price range from USD 260 to USD 687 across 56 offers. Prices on this route change with booking timing, advance purchase, and ancillary add-ons. Find where your trip lands in the distribution →
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