Cheap flights from New Hampshire to Illinois from $81

The cheapest month to fly to Illinois from New Hampshire is in November. Flight prices, which tend to average around $88, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of November, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $103.

The cheapest day to depart from New Hampshire to Illinois is on a Wednesday when prices can be found for as low as $443. Flights from New Hampshire to Illinois on a Sunday will generally be more expensive and average around $541. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from New Hampshire to Illinois during this time can be as low as $408. Flights in the morning are often more expensive with an average ticket price of $480.

Fly from Manchester to Chicago Midway for the best New Hampshire - Illinois flight prices

You are more likely to see cheaper flights to Illinois from New Hampshire when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $249 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from New Hampshire for as low as $207 on momondo.

As of May 2026, there are 78 flights per day flying from New Hampshire to Illinois. The most common time of day flights depart is 12:00PM, with 52% of flights taking off in the afternoon.

The number of flights available between New Hampshire and Illinois is 551 per week as of May 2026. The most frequent departure day is Fri, with 17% of weekly flights leaving on this day.