
Cheap Flights from San Francisco to Illinois
Cheapest round-trip prices found by our users on KAYAK in the last 5 daysBook Cheap San Francisco to Illinois Plane Tickets
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KAYAK's insights & trends for San Francisco to Illinois flights
Get data-powered insights and trends into flights from San Francisco to Illinois to help you find the cheapest flights, the best time to fly and much more.
How much is a round-trip flight from San Francisco to Illinois?
Flight prices are below average for this route right now.
Flights to Illinois from San Francisco usually cost between $331 and $599 in October.The lowest price found in the past 5 days was $257 on Frontier (Oct 27-Oct 29).
What is the cheapest San Francisco to Illinois flight route?
The cheapest ticket to Illinois from San Francisco found in the last 5 days was to Chicago, at $265 round-trip. The most popular route is from San Francisco (SFO) to Chicago O'Hare Intl Airport (ORD), and the cheapest round-trip airline ticket found on this route in the last 5 days was $265.
What is the cheapest time of day to fly to Illinois?
The cheapest time of day to fly to Illinois is generally in the evening, when round-trip flights cost $472 on average. Morning departures are around 9% more expensive than evening flights, on average. The most expensive time of day to fly to Illinois is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $525.
Can I save money by flying with a layover from San Francisco to Illinois?
No, with an average price for the route of $451, prices are generally cheapest when you fly direct.
What is the cheapest month to fly from San Francisco to Illinois?
The cheapest month for flights from San Francisco to Illinois is February, when tickets cost $372 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of round-trip tickets is $484 and $477 respectively.
What’s the cheapest day of the week to fly from San Francisco to Illinois?
If your flying dates are flexible, you should consider flying to Illinois on a Wednesday, as we generally find the cheapest rates on that day for this route. On the other hand, Monday is the most expensive day to fly from San Francisco to Illinois. For your return ticket, we recommend flying on a Thursday and avoiding Sundays for the best deals.
How far in advance should I book a flight from San Francisco to Illinois?
To get a below average price on the flight from San Francisco to Illinois, you should book around 4 weeks before departure, which saves you about 39% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 10 weeks before departure.
Which airlines fly non-stop between San Francisco and Illinois?
There are 5 airlines that fly nonstop from San Francisco to Illinois. They are: American Airlines, Alaska Airlines, JetBlue, Southwest and United Airlines. The cheapest price of all airlines flying this route was found with Alaska Airlines at $204 for a round-trip flight to Chicago O'Hare Intl Airport (ORD). On average, JetBlue offers the best prices for nonstop flights between San Francisco and Illinois.
Which airlines fly most frequently between San Francisco and Illinois?
San Francisco and Illinois are connected by different airlines. The airlines that fly that route the most regularly are United Airlines (122 flights per week), Air Canada (107 flights per week), and Air New Zealand (107 flights per week).
How long does a flight from San Francisco to Illinois take?
The duration of a flight to Illinois depends on your arrival airport. The shortest routes to Illinois from San Francisco are to Chicago, which takes 5h 12m, Moline, which takes 6h 18m, and Champaign, which takes 6h 28m.
Which cabin class options are there for flights between San Francisco and Illinois?
There are 4 cabin class options for the route. These are First, Business, Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.
What’s the earliest departure time from San Francisco to Illinois?
The earliest flight from San Francisco to Illinois departs at 12:35 am, landing in Chicago at 6:56 am.
What’s the latest departure time from San Francisco to Illinois?
If you prefer to fly at night, the latest flight from San Francisco to Illinois jets off at 11:39 pm and lands in Chicago at 5:59 am.
Good to know
Low season | January |
|---|---|
High season | June |
Cheapest flight | $123 |
FAQs - booking Illinois flights
Top tips for finding cheap flights to Illinois
Reviews of the top 5 airlines serving from San Francisco to Illinois
Southwest has been a nightmare. Delayed flights, missed connections, systems down. Never again am I flying southwest.
Southwest has been a nightmare. Delayed flights, missed connections, systems down. Never again am I flying southwest.
I think Southwest is the number one airline that anyone can fly I have flown for the first time Frontier and what a joke and their customer service United was a very strange experience I'm only sticking to Southwest from here on out for sure
3 hour delay. Had to change plans and was still delayed.
As always, the entire Southwest experience was wonderful, from online booking to flight to baggage retrieval. Very grateful.
The weather could have been better. There was a 40 minute ATC delay in SFO because of marine fog and a micro cell storm delayed landing and take-off at Nashville. The gate was changed 5 minutes from boarding from gate B3 to gate C23 at Nashville airport.
The cabin was quiet for the redeye flight. The area was clean. The staff was great. The 787 Max was in good condition. Drawbacks were that the seat widths were tight for some passengers. The seat padding was at best average and for a long flight uncomfortable.
Employees were kind and funny, as always! Flight was late but no announcements were made for people with tight connections to help them transition quickly. No service due to turbulence.
I used to fly SWA all the time. I know the crew has their little acts that are often fun, and entertaining. On this flight one of the crew was just not nice. Very surprising.
The flight was delayed for almost an hour. We sat on the tarmac. There was no announcement. Not by the pilot or the crew. And for some reason, there was no beverage service, so even though it was a short flight, we had sat on the tarmac and the extra hour delay made me understandably thirsty. Water would’ve been nice if they had offered it. And for the first time, I forgot to bring my own water bottle. Reminder to bring your own water bottle because you never know if you’re going to get a beverage.
It was a new plane with larger overhead bins & charging ports at the seats.
This was an auto-rebook due to being delayed from an earlier UA connecting flight. The boarding was fine, but they sat me in a middle seat when my original booking was a window seat. Overall, the flight was fine as it still got me to my final destination.
Sitting in coach even in the larger leg space is extremely uncomfortable and the staff pay no attention.
It was a short, comfortable flight. It did leave an hour late due to the pilot having to be replaced (family emergency) but that didn’t inconvenience myself & my friend. The situation was explained, eventually.
Lost one piece of luggage even though I checked in 2.5 hours before the flight
Horrifying Almost 2 million miles. Bring your own food and drink. One coffee or drink every three hours. Have to order meals on app more than 24 hours ahead Tiny and dirty bathrooms
My service dog and I were asked to deplane just before they closed the door - clearly very last minute they couldn’t find the documentation that I have filled out many many times before that is for flying service animals. I purposely purchase 3seats (a whole row) since he is large and not all passengers want to sit next to a dog on a cross country flight. The plane departed with my husband on it!!! They made me fill out a hard copy of the same form and had to reschedule me on a later flight where they could find 3 seats together!! I’ve done this so many times before - clearly the error was on their part in a technology glitch - but really people - do better!! Very traumatic - and my husband had to wait for us when he landed ….so bad. Poor pup was confused and tired.
No screens or meal options. Freezing cold. Dirty seats. Left late.
Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time
While the staff was pleasant and helpful, the following observations are for your awareness. There was some delay on the tarmac on take off and landing. The paid lunch/food offerings were limited. Entertainment was only available on WiFi at a cost.
United WiFi is consistently unusable (it can take 10 mins to load a single web page). If you need Wifi to do work, be prepared to lose half a day of productivity.
Flight was delayed 3 hours. No food on plane besides snacks
I have flown Jet Blue many times between JFK and SFO. I appreciate how clean the planes are, the ability to select my onboard entertainment and the flight crews have always been amazing! Unfortunately, my trip from SFO to JFK on August 23 was unusual. I arrived early at SFO for the 12:00 noon scheduled boarding. The flight was supposed to take off at 12:45pm but after sitting for a while, the plane had to return to the gate to have a generator inspected. After deplaning and then reboarding, we eventually took off around 3:30 pm. It was explained to the passengers that because the plane was using a backup generator, additional fuel was needed and the flight would take longer than originally scheduled. We were originally supposed to arrive at JFK at 9:32 pm but instead, arrived at midnight. Unfortunately, I was exhausted for the funeral I attended the next morning. As a passenger, I have always expected that the plane will be in good mechanical order and that all parts will function as expected. I'm not entirely certain that if I fly Jet Blue in the future, that I will have the same level of confidence that I had become accustomed to. Thanks for the opportunity to provide this feedback. Kathy Nigro
Seats were great, the staff was great, and the food was about the best I've had on a plane, and is especially the best of any US-based carrier I've flown. Free Wi-Fi was also great.
Rude crew member. She seemed annoyed at me without me saying a single word. Also loudly admonished me for having my bag next to my seat instead of tucked away before landing. Just telling me to put it away and guiding me without giving me a lecture would have been enough.
Too many long delays with JetBlue. Worst major airline that serves JFK but unfortunately I keep going back because of the prices.
Little snafu at boarding. Staff communicated with gate poorly. Flight attendant was rude making disembark early. This was an older mint class. Needs an overhaul for sure. Food was good. The male flight attendant was really nice.
I really liked the way snacks and drinks were available throughout the flight!!! The flight attendants were also all fantastic!
Always like Jet Blue! It seems, however, that people are getting bigger & seats are getting smaller! We had a very full flight and I couldn't get an aisle seat like I always do. I wish there were more leg room. People sitting next to me were very nice though so it was fine to disturb them if I needed to use the restroom. Otherwise the flight was fine but a bit long.
None of the in flight Direct TV worked. A better selection of Shows would have been better. The baggage was s low. Otherwise we enjoyed our flight!
the staff was very helpful and the airline was very good.
Little communication with passengers after sitting over 1 hour for a maintenance issue Then we had to deplane- no crew communication Poor gate information after deplaned WiFi would not connect AT ALL
Flight attendant made the flight very enjoyable. He was courteous and gave great care to the passengers
Not good. Flight crew, was not friendly and just shoved stuff at us. Not the way I like to travel.
Aside from the little delay, overall was flight good. Made it safely. Thanks!
Over the course of 7 months of travel, I can count on my hand the number of times the flight has departed on time. Majority of the instances have been related to non-weather reasons. Would not recommend flying this Airline
The plane was spartan, the seats not that comfortable. It was like flying a super low budget airline. They charged for coffee!!! I have never, ever experienced that before.
The chicken wrap was tiny ($13 for what looked like a 1/3 of a normal wrap?) and disgusting.
We flew in first class. The crew did not offer drinks before the flight took off, but they treated us well during the flight. The food was excellent. There was actually too much food served, but it was nice to have all the options.
It was nice being on a flight that had working wifi. The boarding was quick - why don’t all airlines have small boarding groups window to aisle? Makes so much sense!!! I was disappointed to be the first person stopped to have to gate check my carryon. Especially when there was plenty of overhead space at the back! But I get it…keeps it moving. Crew was nice.
Internet service was erratic. Crew service was poor and slow. My luggage on this non-stop flight was lost and not recovered
I really didn't like anything. Paid for my checked luggage online ($79) and then was told that I would have to paid another $79 for my carry on. Was not allowed to enter the terminal until 3 hours before my flight and when I finally was allowed to check my bag and enter, my flight was delayed 3 times. When I finally landed, we were all instructed to "run off the plane" as they had to do a quick turn around to Las Vegas. Me and several of my flying companions will never fly Frontier again.
They didn’t offer a water, even after I asked
Frontier had yet another flight cancellation. Have never made a complete round trip with this airline without at least one leg getting cancelled. Miserable flights - dirty, uncomfortable planes that apparently always have issues since I've had multiple delays and cancellations with them.
No frills for sure. No gate announcements about flight delay, not even water to drink on the flight.
I loked walking out on the tarmac to board and no first class. I didn't like that they have no snacks or onboard wifi to bide your time.
It was a redeye flight, so every passenger just wanted to sleep, but through the entire flight, the flight crew made announcements over the loudspeaker at maximum volume every few minutes making sleep impossible. For example: it’s 2am, and the crew decides to give an extremely detailed announcement about snacks and beverages for sale. And 3am is the perfect time to wake up everyone with a lengthy announcement about how to get a coffee refill and how to take advantage of new offer from frontier for a credit card.
While booking it was not obvious that I had to pay for carryon. Realized it only during check-in. Overall, meh!
Stop changing gates at sfo. When you are elderly going back for it’s not fun.
After 5 hours of delay, they cancelled the flight. Very disappointed
My flight to LA was cancelled. I waited at the airport for 3 hrs saying it was delayed and then all of a sudden it was cancelled. Frontier only gave me a voucher and refund but could not rebook me. Flights on other airlines were too expensive last minute. I had to drive down to LA and didn’t even take my return flight home since I had to drive. One of the worst airline experiences in my life. It’s crazy how airlines can just upend people’s plans just like that.