Delhi–Patna flights: which month is cheapest, and does IndiGo or Air India win on fares in 2026?
By Saanvi Iyer (Saanvi Iyer writes offbeat destination guides for Indian travellers — places that work in monsoon, shoulder-season picks, and the cities Indian first-time international travellers underrate. Based in Bangalore, perpetually mid-itinerary.) · Published · 10 min read
Delhi–Patna is one of the most emotionally-priced routes in Indian aviation. Fares swing from under ₹2,000 in the deep off-season to well above ₹15,000 around Chhath Puja and Diwali. The cheapest windows are typically January–February and June, with IndiGo and Air India playing a constant leapfrog game on price.
TL;DR — the short answer
The cheapest months to fly Delhi–Patna are typically January–February and mid-June, when base fares often dip below ₹2,500 one-way if you book 3–4 weeks out. IndiGo generally holds the lowest floor price on this route due to sheer frequency, but Air India (including the older full-service Patna flights that absorbed Vistara inventory after the merger) can match or beat IndiGo on specific dates — especially if you are flexible on timing. The worst months to fly are October–November (Diwali + Chhath Puja), when both airlines push fares into territory that feels more international than domestic. Book those trips at least 6–8 weeks out or accept the pain.
Why is Delhi–Patna so prone to fare surges?
Patna is one of those routes where demand is structurally lopsided. A huge chunk of passengers are visiting family — Bihar has one of the largest diaspora populations in Delhi, the NCR, and across north India. That means travel clusters tightly around festivals, exam seasons, and school holidays. When everyone wants to fly in the same two-week window, airlines don't need to discount. They know you're going home for Chhath. You don't have a great alternative.
The route also has limited real competition. IndiGo runs the most frequencies (typically 3–5 daily departures from Delhi), and Air India operates a smaller number of daily flights. Akasa Air and SpiceJet have had limited or sporadic Patna presence. With IndiGo and Air India holding most of the seats, price competition only gets fierce when both airlines have unsold inventory — which mostly happens in the deep off-season.
The 80-minute flight time also means there is no realistic train or bus alternative for time-sensitive travellers, which removes the usual price ceiling that road or rail competition imposes on short-haul air routes.
Month-by-month fare calendar: what to expect
Here is a rough guide to how the Delhi–Patna fare curve moves across the year. These are typical ranges for a one-way economy ticket booked 2–4 weeks in advance — actual fares depend on the exact date, booking platform, and how full the flight is. Always check live on FlightGPT or the airline site for current pricing.
- January–February: Cheapest window of the year. Post-Makar Sankranti, demand drops sharply. Base fares in the ₹1,800–₹3,500 range are not unusual on IndiGo. Air India sometimes matches or undercuts on specific timings. Book 2–3 weeks out and you can find solid deals.
- March–April: Moderate demand. Holi adds a mini-spike (book 4–5 weeks ahead for the Holi travel dates). Outside Holi, fares typically sit in the ₹2,500–₹5,000 range.
- May: Exam season and pre-monsoon heat drive some travel. Fares creep up, often ₹3,000–₹6,000. Not the worst month, but not the cheapest either.
- June: Schools close, families travel, but the monsoon mood suppresses demand enough to keep fares reasonable — often the second-cheapest window after January-February. IndiGo often has base fares in the ₹2,000–₹4,000 band.
- July–September: Monsoon months. Moderate fares but weather-delay risk is real at Patna airport (JAY), which has a shorter runway and can have visibility issues. Budget ₹3,000–₹6,000 and plan for delays.
- October: Navratri and Dussehra start pushing fares up. The Diwali surge can hit 2–3 weeks before the festival itself. Fares regularly cross ₹8,000–₹12,000 for Diwali travel dates if you book late.
- November: Chhath Puja (usually in late October or early November depending on the lunar calendar) is the absolute peak. This is covered in more detail in our Chhath Puja fare surge article. Expect ₹12,000–₹20,000+ for flights in the week of Chhath if you book late.
- December: Christmas and New Year bring another uptick, though milder than Chhath. Fares typically range ₹5,000–₹10,000 for the festive window.
IndiGo vs Air India on Delhi–Patna: who actually wins?
The honest answer is: it depends on when you search and what you value.
IndiGo's advantages: Higher frequency means more choice. If a cheaper IndiGo flight pops up, it is often because IndiGo has more seats to fill on that departure. IndiGo's seat sale prices on low-demand dates frequently undercut Air India's base fare. The IndiGo app tends to show multi-date fare calendars, which helps you shift one or two days to catch a dip. The downside is IndiGo's bare-bones product — no complimentary meal, every add-on is chargeable, and the 6E platform's fees for seat selection and baggage add up if you're not careful.
Air India's advantages: The post-Vistara merger Air India has more fare classes on this route than before — it absorbed Vistara's ticketing inventory, so you sometimes find mid-tier fares with complimentary meals and better change/cancellation terms. Air India's frequent flyer programme (Flying Returns) accrues points that can be redeemed on international routes too. For families who are checking baggage and want meals, the total cost after add-ons can make Air India surprisingly competitive even when its base fare looks slightly higher.
The practical approach: Search both on the same flexible-date view. Use FlightGPT to compare across both airlines on the same screen, then go to the airline site directly to book (to avoid OTA service fees). On most off-peak days, the difference is under ₹500 — pick whichever has the more convenient timing. On peak days, both are expensive; the airline with more remaining inventory will be cheaper, so check both.
How far in advance should you book?
For off-peak travel (January-February, mid-June), 2–3 weeks ahead is usually fine. Fares on these dates don't move dramatically between the 6-week mark and the 2-week mark, and last-minute deals sometimes appear if a flight is not filling well.
For Holi, the summer holidays (May), and the December festive window, book 4–6 weeks ahead.
For Diwali and Chhath Puja — and I can't stress this enough — book as soon as you know your dates. Eight to ten weeks ahead is not too early. Once Chhath dates are confirmed by the panchang (usually 2–3 months before), prices start moving within days. If you are booking a return trip for Chhath, treat the outbound (Delhi→Patna) and the inbound (Patna→Delhi) separately. Often the inbound fares spike even harder the day after Chhath concludes, because everyone is flying back at once.
Baggage and add-on traps to watch on this route
People travelling to Patna from Delhi often carry substantial family freight — mithai boxes, clothing, gifts. IndiGo's base fares do not include checked baggage (their cheapest fares include 7 kg cabin bag only; the 15 kg checked allowance is an add-on on most economy fares on this route). Add-on baggage fees when buying post-booking are typically higher than at the time of booking, and airport fees are higher still. If you know you are checking a bag, add it at booking.
Air India economy fares generally include 15–25 kg checked allowance depending on the fare class, which for a baggage-heavy family trip can make the total cost closer than the base fare difference suggests. Check the fare conditions carefully — Air India's 'Economy Light' bucket may not include baggage either.
Bottom line
January-February and mid-June are your windows for cheap Delhi–Patna fares. IndiGo leads on frequency and floor price; Air India can be surprisingly competitive on total cost once bags and meals are factored in. Book Diwali and Chhath travel at least 8–10 weeks out — this is non-negotiable on one of India's most surge-prone domestic routes. Use FlightGPT to track flexible-date pricing across both airlines, and read our full Chhath Puja fare guide if you're planning a festival trip. For route-specific fare data, also check the routes section on FlightGPT.
Frequently asked questions
What is the cheapest month to fly from Delhi to Patna?
January and February are typically the cheapest months, with base fares often in the ₹1,800–₹3,500 range if booked 2–3 weeks in advance. Mid-June is the second-best window. Avoid October–November (Diwali and Chhath Puja) unless you book 8–10 weeks ahead.
Is IndiGo or Air India cheaper on the Delhi–Patna route?
IndiGo generally has the lowest floor price due to higher frequency, but Air India can match or beat IndiGo on specific dates — especially once baggage and meals are factored in. Always compare both on the same dates using FlightGPT or the airlines' own fare calendars before booking.
How much do Delhi–Patna fares rise during Chhath Puja?
Significantly — one-way fares can go from around ₹3,000 in the off-season to ₹12,000–₹20,000 or more for flights in the week of Chhath if booked late. Book at least 8 weeks ahead once Chhath dates are confirmed. The Patna→Delhi return leg after Chhath is often the most expensive single fare of the year on this sector.
Does Air India include free meals and baggage on Delhi–Patna flights?
Most Air India economy fares (not the cheapest 'Economy Light' bucket) include a complimentary meal and 15–25 kg checked baggage depending on the fare class. Always verify the fare conditions in the booking flow — the exact allowance varies by fare bucket and can change.
Is there a last-minute deal option on Delhi–Patna?
Occasionally, on off-peak dates with poor load factors, IndiGo releases last-minute fares in the 24–48 hour window before departure. These are rare on peak dates. If your travel is flexible, you can monitor fares on FlightGPT's flexible-date view, but for most people the risk of a last-minute high fare outweighs the potential saving.