Cheap Flights from San Diego to Chicago O'Hare International

Compare San Diego to Chicago O'Hare International flight deals

Find the cheapest month or even day of the year to fly to Chicago O'Hare International

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Flight deals from San Diego to Chicago O'Hare International

Looking for a cheap last-minute deal or the best return flight from San Diego to Chicago O'Hare International Airport? If you want to travel next month, return fares start from R 4,064. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from San Diego to Chicago O'Hare International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like San Diego to Chicago O'Hare International flights are currently cheapest in July.

Direct flights from San Diego to Chicago O'Hare International

San Diego to Chicago O'Hare International: Alternative routes

Compare routes from San Diego to Chicago below. You may find an airport to fly into that's cheaper, faster, or easier than Chicago O'Hare International.

San Diego to Chicago: Flight information

The things to know before you go.
Cheapest flight foundR 1,646
Cheapest month to flyJuly
Average flight time4 hrs, 21 mins
Most popular airlineAmerican Airlines
Average flights per week734

Finding cheap flights from San Diego to Chicago O'Hare International: Frequently asked questions

The best price we found for a return flight from San Diego to Chicago O'Hare International is R 3,287. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
4 hours and 21 minutes is the average flight time from San Diego to Chicago O'Hare International.
American Airlines, Qatar Airways and United fly direct from San Diego to Chicago O'Hare International.
As of June 2026, there are 734 flights per week flying from San Diego to Chicago O'Hare International.
The cheapest month to fly from San Diego to Chicago O'Hare International is usually August.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from San Diego to Chicago O'Hare International Airport on Tuesday, 4 August 2026.
Yes – the average flight time is 4 hours and 21 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Chicago O'Hare International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Chicago is around 40 days in advance, so don’t leave your flight to the last minute.

Flying from San Diego to Chicago O'Hare International Airport (ORD): What you need to know

  • San Diego's main airport is San Diego International Airport (SAN). Explore your departure options from this base when searching for your flights from San Diego to Chicago O'Hare International Airport (ORD).

  • Expect to be travelling for 4 hours 10 minutes. On average, that's the duration of a direct San Diego to Chicago O'Hare International Airport flight.

  • The timezone in Chicago is UTC-6, which is two hours ahead of San Diego. Chicago O'Hare International Airport is located in Chicago.

  • San Diego International Airport (SAN) to Chicago O'Hare International Airport (ORD) is the busiest route. You can select from 77 direct weekly services between SAN and ORD.

  • Get to the airport on time so you don't miss your flight from San Diego to ORD. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid sprinting to your gate.

  • Popular months like July or holiday periods such as Thanksgiving and Christmas will mean longer waits at check-in and security. Play it safe and head to the terminal even earlier. Arriving two hours before domestic flights and up four hours ahead of international flights is a smart idea.

Airports in San Diego

San Diego International Airport (SAN)

  • Fly without interruptions from San Diego International Airport (SAN). Direct flights from San Diego to Chicago O'Hare International Airport (ORD) are available from here.

  • Choose from a variety of airlines that operate direct flights from San Diego to Chicago O'Hare International Airport departing from SAN. Book your seat with one of these:

  • The top choice among passengers flying between SAN and ORD is United.

  • Among carriers operating on this route, United has the best record for on-time arrivals.

  • SAN is about 5 kilometres from central San Diego. If you're ride-sharing, driving or catching a taxi from the centre, it'll take 15 minutes or so to get there, depending on the traffic. If you're taking public transport, expect the travel time to be around 25 minutes.

  • Booked an early flight from San Diego to Chicago O'Hare International Airport? Avoid the last-minute rush to the terminal (and sneak in some extra snooze time) by choosing one of these hotels near San Diego International Airport:

  • When it comes to the on-time performance of San Diego International Airport, 74% of flights arrive within the scheduled time frame.

  • You'll find SAN at N Harbour Dr.

McClellan-Palomar Airport (CLD)

  • CLD is around 48 kilometres from the centre of San Diego. Plan ahead to find the fastest way to get to your terminal.

  • Flying off with the first light? Think about checking in to one of these accommodation options near McClellan-Palomar Airport the day before your San Diego to ORD flight:

  • McClellan-Palomar Airport has a solid reputation for punctual service. 88% of flights taking off from here arrive right when they're supposed to.

About Chicago O'Hare International Airport (ORD)

Getting from Chicago O'Hare International Airport (ORD) to central Chicago

  • From Chicago O'Hare International Airport, central Chicago is around 27 kilometres away. It takes about 30 minutes to get to the city centre by car.

  • Travelling on public transport takes around 45 minutes.

How to find the cheapest flights from San Diego to Chicago O'Hare International Airport (ORD)

  • R 1,646 is the best price for a one-way ticket from San Diego to Chicago O'Hare International Airport. A return flight starts from R 3,287. These prices may change depending on demand.

  • Booking early is often the key to scoring a cheap flight from San Diego to ORD. Prices tend to rise as demand increases, so the closer your departure date, the more expensive your ticket may be.

  • Cheap San Diego to Chicago O'Hare International Airport tickets are easier to find when your travel dates are flexible. Use the 'Whole month' search tool to compare fares throughout the month and then pick the cheapest day.

  • Save time searching for cheap plane tickets from San Diego to ORD by creating a Price Alert. We'll send you an email or notification through the app when fares go down.

  • Nail down a great price on a flight from San Diego to Chicago O'Hare International Airport with the help of the filters. Pick your ideal departure and arrival times, number of stops and airlines. You can also sort your results by 'Best,' 'Cheapest' or 'Fastest.'

The best time to fly from San Diego to Chicago O'Hare International Airport (ORD)

  • It's time to decide your travel dates for your flight from San Diego to Chicago O'Hare International Airport (ORD). July is the peak month for travel to Chicago. If you like things a bit more low-key, head there in January.

  • Book a San Diego to ORD plane ticket departing in July if you want to experience the city during its warmest month. Expect temperatures in Chicago to range from 16ºC (61ºF) to 28ºC (82ºF).

  • Search for cheap tickets from San Diego to Chicago O'Hare International Airport in January if you'd rather travel when it's cooler. Temperatures are at their lowest then, ranging between -12ºC (10ºF) and 3ºC (37ºF).

More about Chicago

Explore more of the United States

  • You've seen Chicago, now it's time to explore more of the United States. Travel about 290 kilometres southeast to Indianapolis to tick off its must-visit sights. From Lucas Oil Stadium to Eiteljorg Museum and The Children's Museum of Indianapolis, there's plenty to keep you busy.

  • Milwaukee is another must-experience destination in the United States and is around 121 kilometres north of Chicago. No journey is complete without experiencing Richards Duplex Apartments by Frank Lloyd Wright, Miller Park and Milwaukee County Zoo.

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.