San Diego (SAN) → Chicago (MDW)
A reference for the San Diego International Airport to Chicago Midway International Airport route. You'll find the operators on file, the great-circle geometry, the connecting options if no nonstop fits your dates, and a short profile of each endpoint airport.
The flight from San Diego (SAN) to Chicago (MDW) covers a great-circle distance of roughly 2,776 km (1,725 miles). Aircraft leave San Diego International Airport on an initial northeast heading. As US domestic sectors go, this one sits in the long-haul bracket: long enough that most carriers run it as its own dedicated rotation, but short enough to fit inside a single crew duty period.
Southwest Airlines is the only carrier filing a scheduled SAN to MDW service in the dataset. Single-operator routes like this usually reflect a focus-city or hub-spoke relationship, or a market that's big enough to support one dedicated daily but not big enough to attract a second entrant yet.
Operators on the SAN → MDW direction
Carriers with at least one scheduled rotation on this sector in the OpenFlights dataset, ranked by the number of code-shared filings.
| IATA | Airline | Country | Callsign |
|---|---|---|---|
| WN | Southwest Airlines | United States | SOUTHWEST |
This is a long-haul sector. It's long enough that the heaviest rotations need wide-body aircraft, but short enough that twin-aisle types like the Airbus A330 and Boeing 787 carry the bulk of the traffic ahead of the larger 777 and A350. Plan for an in-flight meal service, an entertainment cycle, and a block time near 4h.
If a nonstop doesn't match your dates, Atlanta (ATL), Los Angeles (LAX), and Denver (DEN) show up on both ends of the network and make the most natural connecting points. The connecting-hubs grid below extends that list to the eight strongest options, ranked by each airport's overall departure activity. That ranking is a fast proxy for how many onward flights a single stop is likely to feed.
Connecting hubs
Airports that already appear on both ends of this network. They're the natural one-stop options when no nonstop matches your dates, ranked by overall departure activity.
Both endpoints sit inside the United States, so this counts as a domestic sector for fare-bucket, baggage, and carry-on purposes. Reservations on US carriers usually pick up the standard domestic checked-bag fee unless you hold elite status, and TSA PreCheck eligibility applies at the departure airport. See the United States routes index for other domestic pairs in the same network.
On the day of operation, the SAN to MDW direction lifts off heading northeast, then the great-circle track curves to compensate for the Earth's rotation. The return MDW to SAN sector heads west out of the gate, with 2 operators on file for the inbound side. Combine the two operator lists for a full picture of the city pair's competitive landscape.
BTS domestic traffic (SAN → MDW, 2025)
Real 2025 passenger, freight, and departure-frequency totals for this exact non-stop segment, from the U.S. Bureau of Transportation Statistics T-100 Domestic Segment (All Carriers) database — not an OpenFlights field. Scheduled-passenger service (BTS service class F) only; all-cargo and non-scheduled service are excluded.
| Carrier code | Carrier (BTS record) | Passengers | Departures performed |
|---|---|---|---|
| WN | Southwest Airlines Co. | 133,506 | 991 |
Aircraft types flown on this segment in 2025, by departures performed: Boeing 737-700/700LR/Max 7 (409 departures), Boeing B737 Max 800 (339 departures), Boeing 737-800 (243 departures). Mail carried: 0 lb. Departures scheduled vs. performed: 999 scheduled, 991 performed.
Data as of: full calendar year 2025 (all 12 months) · Source: BTS T-100 Domestic Segment (All Carriers), U.S. DOT Bureau of Transportation Statistics (public domain, U.S. government work). Carrier names and aircraft-type descriptions are BTS's own record values, not this site's. Figures reflect carrier-filed BTS reports, not real-time bookings. See the BTS domestic traffic hub and methodology for match coverage and corrections path.
Endpoints
Other routes from San Diego (SAN)
Other destinations served from the same origin. Handy for combining trips or for finding an alternate first leg.
Other routes into Chicago (MDW)
Other origins that already file scheduled service into the destination airport.
Reading this route page
The operator list reflects scheduled-route filings in the OpenFlights dataset, not real-time availability. A carrier appearing here publishes a scheduled service on this sector. It isn't a live timetable, and the actual flight numbers, frequencies, and aircraft types shift season to season. For booking and current schedules, cross-reference the airline page above with the carrier's own website.
Distance here is the great-circle arc between the two airports' published coordinates. Real flight tracks wander off that line because of wind, ATC routings, oceanic crossings, and political airspace constraints. Block time is an estimate covering ground taxi, climb, cruise at typical jet speeds, and descent. Real block times shift with aircraft type, weather, and traffic, so treat the stat-strip number as a planning indicator rather than a published flight time.