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Cheap flight tickets from Chicago O'Hare International to San Diego

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Compare Chicago O'Hare International to San Diego flight deals

Find the cheapest month or even day of the year to fly to San Diego

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Flight deals from Chicago O'Hare International to San Diego

Looking for a cheap last-minute deal or the best return flight from Chicago O'Hare International to San Diego? Find the lowest prices on one-way and return tickets right here.
San Diego.RM506 per passenger.Departing Tue, 10 Jun, returning Tue, 17 Jun.Return flight with Spirit Airlines.Outbound indirect flight with Spirit Airlines, departs from Chicago O'Hare International on Tue, 10 Jun, arriving in San Diego International.Inbound indirect flight with Spirit Airlines, departs from San Diego International on Tue, 17 Jun, arriving in Chicago O'Hare International.Price includes taxes and charges.From RM506, select.
San Diego.RM698 per passenger.Departing Wed, 2 Jul, returning Wed, 9 Jul.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Chicago O'Hare International on Wed, 2 Jul, arriving in San Diego International.Inbound direct flight with Frontier Airlines departs from San Diego International on Wed, 9 Jul, arriving in Chicago O'Hare International.Price includes taxes and charges.From RM698, select.
San Diego.RM704 per passenger.Departing Sat, 14 Jun, returning Sat, 19 Jul.Return flight with Spirit Airlines and Frontier Airlines.Outbound indirect flight with Spirit Airlines, departs from Chicago O'Hare International on Sat, 14 Jun, arriving in San Diego International.Inbound indirect flight with Frontier Airlines, departs from San Diego International on Sat, 19 Jul, arriving in Chicago O'Hare International.Price includes taxes and charges.From RM704, select.
San Diego.RM707 per passenger.Departing Sat, 28 Jun, returning Sat, 5 Jul.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Chicago O'Hare International on Sat, 28 Jun, arriving in San Diego International.Inbound direct flight with Frontier Airlines departs from San Diego International on Sat, 5 Jul, arriving in Chicago O'Hare International.Price includes taxes and charges.From RM707, select.
San Diego.RM720 per passenger.Departing Sat, 21 Jun, returning Wed, 25 Jun.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Chicago O'Hare International on Sat, 21 Jun, arriving in San Diego International.Inbound direct flight with Frontier Airlines departs from San Diego International on Wed, 25 Jun, arriving in Chicago O'Hare International.Price includes taxes and charges.From RM720, select.
San Diego.RM729 per passenger.Departing Tue, 12 Aug, returning Thu, 14 Aug.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Chicago O'Hare International on Tue, 12 Aug, arriving in San Diego International.Inbound direct flight with Frontier Airlines departs from San Diego International on Thu, 14 Aug, arriving in Chicago O'Hare International.Price includes taxes and charges.From RM729, select.
San Diego.RM763 per passenger.Departing Tue, 29 Jul, returning Wed, 6 Aug.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Chicago O'Hare International on Tue, 29 Jul, arriving in San Diego International.Inbound direct flight with Frontier Airlines departs from San Diego International on Wed, 6 Aug, arriving in Chicago O'Hare International.Price includes taxes and charges.From RM763, select.
San Diego.RM784 per passenger.Departing Fri, 3 Oct, returning Sat, 11 Oct.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Chicago O'Hare International on Fri, 3 Oct, arriving in San Diego International.Inbound direct flight with Frontier Airlines departs from San Diego International on Sat, 11 Oct, arriving in Chicago O'Hare International.Price includes taxes and charges.From RM784, select.

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

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Chicago O'Hare International to San Diego flights are currently cheapest in June.
May
from RM939
Jun
from RM506
Jul
from RM698
Aug
from RM729
Sep
from RM811
Oct
from RM784
Nov
from RM929
Dec
from RM1,567
Jan
from RM1,592
Feb
from RM1,580
Mar
from RM1,593
Apr
Find prices

Direct flights from Chicago O'Hare International to San Diego

Alternative Chicago O'Hare International to San Diego routes

Looking for the cheapest, fastest or easiest route from Chicago O'Hare International to San Diego? You could fly into the following airports instead.

Chicago to San Diego: Flight information

The things to know before you go.
Cheapest flight foundRM506
Cheapest month to flyJune
Average flight time4 hrs, 23 mins
Most popular airlineAlaska Airlines
Average flights per week315

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

There are 2 airports in San Diego: San Diego International and McClellan-Palomar.
The best price we found for a return flight from Chicago O'Hare International to San Diego is RM506. 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 23 minutes is the average flight time from Chicago O'Hare International to San Diego.
Alaska Airlines, United and American Airlines fly direct from Chicago O'Hare International to San Diego.
As of May 2025, there are 300 flights per week flying from Chicago O'Hare International to San Diego.
The cheapest month to fly from Chicago O'Hare International to San Diego is usually May 2025.
If you're flying from Chicago O'Hare International Airport, the cheapest airport near San Diego is San Diego International – which is 4.1 km away from the centre of San Diego. We've found flights into this airport from RM506.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Chicago O'Hare International Airport to San Diego on Tuesday, 10 June 2025.
Yes – the average flight time is 4 hours and 23 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 San Diego 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 San Diego is around 40 days in advance, so don’t leave your flight to the last minute.
In May, the average temperature is usually around 17°C. August is typically the warmest month in San Diego, when it usually averages around 28°C. You can expect the least rain in June. The coldest month is December, with temperatures averaging 10°C. The rainiest month is February.
Currently, Spirit Airlines and Frontier Airlines offer the cheapest flight tickets to San Diego.

Travelling from O'Hare International Airport (ORD) to San Diego: what you need to know

  • Approximately 4 hours 10 minutes is how long you'll be travelling on a direct flight from O'Hare International Airport to San Diego.

  • San Diego is two hours behind Chicago, where O'Hare International Airport is located. San Diego observes the UTC-7 timezone.

  • The busiest route is from O'Hare International Airport (ORD) to San Diego International Airport (SAN). You can select from 58 services every week between these two airports. If you want to take off as soon as possible, the earliest flight from ORD to SAN is the 06:48 American Airlines service. If you prefer to leave later in the day, the final departure is at 21:33 with American Airlines.

  • For a smooth journey, turn up at the airport two hours ahead of international flights and an hour before domestic departures. This leaves you with plenty of time to board your ORD to San Diego flight.

  • Longer lines at check-in and security are likely if you're travelling during high season, so give yourself a little extra breathing room. A good rule for peak times? Arrive up to four hours ahead for international flights and two hours for domestic departures.

  • Start your journey at ORD and fly straight to San Diego International Airport (SAN). That will be your arrival point when searching for O'Hare International Airport to San Diego tickets.

  • Book your favourite seat with United Airlines. This airline offers direct flights from O'Hare International Airport to San Diego.

  • Travelling from central Chicago to ORD takes around 55 minutes on public transport. If you drive, ride-share or grab a cab, you'll cover the 26 kilometres in 35 minutes or so, depending on traffic conditions.

  • Searching for a hotel close to ORD? If you're boarding an early flight from O'Hare International Airport to San Diego, these accommodation options will get you from your pillow to the plane in no time:

  • When it comes to the on-time performance of O'Hare International Airport, 74.85% of flights complete their journey on time.

  • ORD's address is 10000 West O'Hare.

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

  • The lowest price we've seen for a one-way O'Hare International Airport to San Diego flight is RM297. The cheapest price for a return flight is RM506. Keep in mind fares can change due to demand at the time of booking.

  • To pick up cheap flights from ORD to San Diego, book your journey one month before your planned departure.

  • Schedule your trip for May. That's the best month for scoring an awesome deal on O'Hare International Airport to San Diego tickets. If you're open to different travel dates, use the 'Whole month' tool to find the cheapest price across each month.

  • There's no need to keep looking every day to see if fares have dropped when you set up a Price Alert. We'll let you know when there's an even better deal on cheap flights from ORD to San Diego.

  • Find an affordable flight from O'Hare International Airport to San Diego with the help of our filters. Choose your preferred times, number of stops and airlines, then sort the results by 'Cheapest' for the best deals.

Airports in San Diego

San Diego International Airport (SAN)

  • The distance from San Diego International Airport (SAN) to central San Diego is roughly 5 kilometres. It takes around 10 minutes to get to the centre driving.

  • It typically takes 20 minutes if you're travelling by public transport.

  • If you have a late flight from O'Hare International Airport to San Diego, few things beat the convenience of staying near the terminal. Grab your luggage from the carousel and then be showered and relaxing soon after at one of these hotels near SAN:

  • Grab a San Diego International Airport rental car and explore San Diego and beyond with your own set of wheels. Thrifty, Dollar and Budget are well-known companies you can book with here.

  • For the lowest price, book your vehicle from San Diego International Airport around two weeks in advance of your flight from ORD to San Diego.

  • You'll find SAN at N Harbour Dr.

McClellan-Palomar Airport (CLD)

  • The centre of San Diego is located around 56 kilometres from McClellan-Palomar Airport (CLD). After your flight from O'Hare International Airport to San Diego has hit the runway and you've made your way through the terminal, expect a drive of about 40 minutes.

  • If you're travelling on public transport, it'll take around 2 hours 15 minutes.

  • Hang up the 'Do not disturb' sign and relax at a hotel near CLD. Here are a few options where you can check in after your ORD to San Diego flight:

  • No need to worry about public transport schedules or long cab queues. Pick up a McClellan-Palomar Airport rental car and let your trip unfold on your terms. Compare availability and rates from Budget, Hertz and Avis.

  • Lock in the vehicle you want, not just what's left over, by securing your ride from CLD before your arrival. You can also avoid last-minute price hikes, especially during busy airport times.

Best time to go to San Diego

  • Carefully consider your trip dates before booking your flight from O'Hare International Airport to San Diego. The city buzzes during high season, but rates are usually higher and major attractions can get busy. Go to San Diego in the low season for a more relaxed vibe.

  • Lock in an O'Hare International Airport to San Diego flight ticket with a departure in August to explore the city during its warmest month. Expect temperatures to range from 17ºC (63ºF) to 28ºC (82ºF).

  • If you like cooler conditions, look for a cheap ticket from ORD to San Diego in February when temperatures average between 7ºC (45ºF) and 23ºC (73ºF).

More about San Diego

  • Start your San Diego trip off on the right foot by choosing the perfect place to stay. Once you've booked your flight from O'Hare International Airport to San Diego, browse our range of hotels including:

  • USS Midway Museum and San Diego Zoo are just the start of the big attractions to add to your San Diego itinerary. Keep the adventure rolling by checking out SeaWorld San Diego.

Explore more of United States

  • Los Angeles is just one of the many places in United States waiting to be explored after you've seen San Diego. Around 177 kilometres away to the north-west, its top attractions include Griffith Observatory, The Broad and La Brea Tar Pits & Museum.

  • Phoenix is another well-known destination in United States and is around 483 kilometres east of San Diego. No journey is complete without seeing Desert Botanical Garden, Heard Museum and Papago Park.

Plan the rest of your trip from Chicago to San Diego

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.