Cheap flights from Los Angeles to Illinois from £79

The month of September is, on average, the cheapest month to fly to Illinois from Los Angeles, with most prices found around £181. If you aren’t able to travel to Illinois during the month of September, then flying in August is also cheap. Prices for this month can be found on momondo for an average of £192.

The cheapest day to depart on your flight to Illinois is on a Tuesday when prices can be found for as low as £225. This is often the case because there is less demand to fly during this day of the week. Flights from Los Angeles to Illinois on a Saturday will generally be more expensive and average around £1,032. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Our data shows that the cheapest Los Angeles to Illinois flights are usually those with departure times in the evening. Our users have found flights to Illinois in the evening for as low as £225. At midday is when there is more demand to fly to Illinois, so prices are often more expensive at around £486 per ticket.

Fly from Los Angeles to Chicago O'Hare Intl for the best Los Angeles - Illinois flight prices

You are more likely to see cheaper flights to Illinois from Los Angeles when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around £231 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Los Angeles for as low as £192 on momondo.

There are 4 cabin classes available to choose from on Los Angeles to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

As of February 2026, 87 flights take off from Los Angeles and land in Illinois each day. The most common flight departure time for this route is 08:00, with 50% of daily flights taking off at midday.

The number of flights available between Los Angeles and Illinois is 611 per week as of February 2026. The most frequent departure day is Fri, with 17% of weekly flights leaving on this day.