Cheap flights from Karnataka to Bihar from ₹ 7,171

The cheapest month to fly to Bihar from Karnataka is in September. Flight prices, which tend to average around ₹ 6,039, are often lower during this time because this is during the off-season. If you aren’t able to travel to Bihar during the month of September, then flying in December is also cheap. Prices for this month can be found on momondo for an average of ₹ 6,888.

Our data shows that Tuesday is the least expensive day to fly to Bihar. Tickets to fly out on this day can be as low as ₹ 15,601. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Bihar on Sunday is ₹ 17,626.

Our data shows that the cheapest Karnataka to Bihar flights are usually those with departure times at midday. Our users have found flights to Bihar at midday for as low as ₹ 15,601. In the afternoon is when there is more demand to fly to Bihar, so prices are often more expensive at around ₹ 17,362 per ticket.

Fly from Bengaluru Intl to Darbhanga for the best Karnataka - Bihar flight prices

You are more likely to see cheaper flights to Bihar from Karnataka when booking weeks ahead of your departure date. In general, you can expect to find flights to Bihar for around ₹ 16,158 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Bihar from Karnataka for as low as ₹ 13,493 on momondo.

There are 2 cabin classes available to choose from on Karnataka to Bihar flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Air India Express is the most popular carrier operating from Karnataka to Bihar

IndiGo, SpiceJet and Air India Express are the top three most popular airlines that fly to Bihar from Karnataka according to our data. IndiGo is the first choice among our users, with 49% of people opting to fly with this airline when travelling to Bihar. Keep in mind that there are 5 different airlines that fly to Bihar on a routine basis, so you have a few additional options to choose from.

As of June 2026, there are 13 flights per day flying from Karnataka to Bihar. The most common time of day flights depart is 08:00, with 50% of flights taking off in the afternoon.

The number of flights available between Karnataka and Bihar is 91 per week as of June 2026. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.