Mumbai–Singapore Flights in 2026: Cheapest Month, Best Airline, and When to Book
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 · 11 min read
February and September are consistently the cheapest months for Mumbai–Singapore flights in 2026. June is reliably the most expensive. Whether IndiGo or Singapore Airlines wins on value depends on how you travel — SIA has fewer surprises once you add bags and meals to IndiGo's bill. Here's the full picture.
TL;DR — Mumbai–Singapore Fare Summary
The cheapest months for Mumbai–Singapore flights in 2026 are typically February and September — both sitting in genuine low-demand windows for the route. June is reliably the most expensive month, driven by Indian summer school holidays and strong two-way Singapore–India leisure traffic. September is the underrated gem: post-monsoon, shoulder pricing from Mumbai, and Singapore isn't doing anything particularly expensive either.
On the carrier comparison: IndiGo is almost always cheaper on base fare. Singapore Airlines is a meaningfully better experience and can look surprisingly close in value once you add IndiGo's ancillaries. For the all-in comparison by month, keep reading.
The Mumbai–Singapore Route: What's Actually Running in 2026
Mumbai (BOM) to Singapore (SIN/Changi) is one of the most competitive international routes from India. You've got IndiGo, Air India, Singapore Airlines, and Scoot all fighting for the same passengers. Air India Express plays in this market too occasionally. The frequency is high on this corridor — multiple departures daily across carriers — which is good news for fare competition.
Singapore Airlines operates from Mumbai with its mainline fleet, meaning proper aircraft, full recline in economy, better meal quality, and the full SIA experience. IndiGo operates A320-family narrowbodies — perfectly fine for the roughly 5-hour 20-minute flight, but a different proposition.
Scoot (SIA's low-cost arm) also serves BOM–SIN and can be the cheapest option of all when it runs fares on its own platform. Scoot's pricing structure is similar to IndiGo — ancillaries extra. If you find a Scoot sale fare, the value can be excellent, though flexibility for changes or refunds is limited.
February Low Season: Why This Is the Cheapest Window
February is consistently the month where Mumbai–Singapore fares hit their floor. Here's why it lines up so well:
In India, February sits between the Republic Day cluster (late January, which spikes slightly) and Holi (which in some years falls late February, in others March). It's a quiet month domestically and internationally — no major Indian school holidays, no massive festival cluster, just everyday traffic. Airlines are managing their yields post-Christmas and fares are soft.
From Singapore's end, February is also not a peak inbound period for Indian leisure tourists. Chinese New Year (which can create demand spikes at Changi from other Southeast Asian corridors) doesn't significantly drive BOM–SIN fares. The result is that airlines frequently post their lowest inventory prices in February — particularly in the first two weeks before any Valentine's Day weekend micro-bump.
I've checked BOM–SIN prices through February dozens of times for friends asking 'when should I go?' — February almost always surfaces the lowest fares in a year. If your workplace gives you leave flexibility, this is the month to use it for a Singapore trip from Mumbai.
June Peak: How Much More Expensive Is It?
June is the month that makes travel agents grimace when clients call late. Indian school summer holidays drive a sharp surge in family travel demand from Mumbai to Singapore — it's a short-haul international destination that's enormously popular for family trips (Universal Studios, Gardens by the Bay, the food, the malls). When Indian families converge on SIN from BOM in June, fare inventory tightens fast.
The gap between February and June fares on BOM–SIN can be substantial in percentage terms. I'd be cautious about quoting exact figures because they vary by airline and year, but the difference in fare buckets between a February and a mid-June departure is typically significant enough to notice in your budget. Families of four will feel it more than solo travellers because the cost multiplies.
June is also peak SIA demand on this route — Singapore Airlines fills seats faster in June, and their cheapest economy fare buckets (which can be genuinely competitive) sell out well in advance. If you must fly in June, book by March to have a reasonable chance at competitive pricing. Do not book in May for June travel and expect anything other than full-fare inventory.
September: The Underrated Low-Season Month
September deserves more attention than it gets for Mumbai–Singapore travel. By September, the June–August peak has wound down, Indian school terms are back in session (which takes the family leisure crowd largely out of the equation), and Singapore is in its quieter inbound period before the year-end ramp-up.
Mumbai itself in September is still in monsoon, which means fewer people are in the 'let me plan a Singapore trip' headspace — which ironically helps the fare situation for those who are planning. The demand dip is real and the fares reflect it.
September also has no major Indian festival cluster in 2026 (Navratri starts late September or October depending on the calendar year, Diwali is typically October–November). So you get genuine shoulder pricing without a festival spike at either end of the month.
If February is unavailable and you're looking for the next best fare window, September is my call. Worth searching the 2nd week through the last week, avoiding any Navratri-adjacent travel days if the festival falls at month-end.
IndiGo vs Singapore Airlines: An Honest All-In Comparison
The base fare comparison favours IndiGo, usually clearly. But let's be honest about what you're actually comparing:
IndiGo (6E) on BOM–SIN: Base economy fare, checked baggage extra (typically 20kg add-on at booking is cheapest), meal extra, preferred seat extra. For a solo traveller with just a cabin bag who'll survive 5 hours without eating, IndiGo's base fare is genuinely cheap. For two adults with luggage who want to eat on a 5-hour flight and sit together, add it all up before patting yourself on the back for the low fare.
Singapore Airlines on BOM–SIN: Economy fare typically includes checked baggage and a meal (verify at time of booking as fare classes vary). The aircraft is generally larger and the seat better. IFE is excellent. The Singapore-quality service on a 5-hour flight is a different experience, and the crew training difference between SIA economy and IndiGo economy is noticeable — not a minor thing for passengers who fly regularly.
In February and September, the all-in gap between IndiGo and SIA is at its widest — IndiGo is genuinely meaningfully cheaper. In June, the gap can close substantially. SIA's June fares spike, but so does IndiGo's base fare, and when you're paying peak rates you're sometimes paying near-SIA prices for an LCC experience. That's the window where the comparison shifts most clearly in SIA's favour on value.
Frequent flyers should also factor in KrisFlyer accrual. BOM–SIN on SIA earns KrisFlyer miles that actually matter — Singapore uses KrisFlyer for award flights and upgrades aggressively. IndiGo's BluChip is more limited. If you're building toward a redemption, the SIA miles have practical value. Use FlightGPT's comparison tool to see both airlines side by side for your dates.
What About Air India and Scoot on BOM–SIN?
Air India is the third meaningful option on BOM–SIN and worth keeping in the comparison. Post-Vistara merger, Air India's product has improved and their pricing on BOM–SIN is competitive — they have to be, given the SIA and IndiGo competition on this route. Air India typically bundles baggage and meal in economy (verify at booking), which makes them easier to compare against SIA than against IndiGo.
Scoot (SQ's LCC) occasionally has BOM–SIN fares that genuinely undercut everyone. Scoot fares are best found on their own website or app — the GDS distribution isn't always complete. The catch: Scoot's change/refund policies are restrictive, and their timing might not be optimal. But if you find a Scoot sale and you're flexible, it's worth taking seriously.
Air India Express has played in this market too at times. Check their current BOM–SIN schedule — they're expanding and the fares can be competitive, especially for routes where they have new capacity.
For travel agents booking multiple passengers on BOM–SIN, the combination of SIA's frequency and Air India's all-inclusive pricing often makes them the practical choice over assembling IndiGo ancillaries per-passenger. The FlightGPT Partner portal gives B2B fare visibility across all these carriers on the route.
How Far in Advance to Book — Mumbai–Singapore by Season
The booking window that works varies meaningfully by month:
- February: Relatively forgiving — 6–8 weeks ahead is usually sufficient to find good fares. Advance booking of 3–4 months gives you the widest selection but isn't essential.
- June: Book 3–5 months ahead. Realistically, for June you want to be done by March. The cheap buckets on SIA and even IndiGo's lowest fares disappear fast once schools announce holidays.
- September: 4–6 weeks ahead is often fine, but if you want specific flight times on SIA (say, the evening departure that's best for a full workday), book a bit further out.
- December (first three weeks): Book by August–September. Year-end Mumbai–Singapore is consistently sold out of affordable economy by October.
Fare alerts on FlightGPT or Google Flights are useful for February and September because fares in those months can occasionally drop further with a promotional fare — you're not always at floor price the first time you check. For June and December, don't wait for a sale that probably won't come. Just buy when you find a reasonable fare.
Bottom Line: February or September, Compare All-In, Book Early for Peak
Mumbai–Singapore is one of the best-served India international routes and a genuinely excellent destination for Indian travellers — easy visa (Indian citizens are now eligible for Singapore e-visa, verify the current process on the Immigration and Checkpoints Authority of Singapore website), short flight, outstanding food, and a city that rewards repeat visits.
For fares: February and September are your friends. For airlines: don't let IndiGo's headline fare fool you without adding the bag and meal. For peak months: book early and accept that June is expensive — it always is. And if you want the most transparent all-in fare comparison across IndiGo, SIA, Air India, and Scoot on your specific dates, run it on FlightGPT — we pull from multiple sources and show you the actual numbers, not just the base. For more destination guidance on Singapore trips from India, check the FlightGPT destinations panel.
Frequently asked questions
What is the cheapest month to fly Mumbai to Singapore in 2026?
February and September are consistently the cheapest months for BOM–SIN fares. Both sit in genuine low-demand windows — February is post-holiday and pre-festival, September is post-monsoon and between festival clusters. June is typically the most expensive month, driven by Indian school summer holidays.
Is IndiGo or Singapore Airlines cheaper for Mumbai–Singapore?
IndiGo has a lower base fare, but it's a low-cost carrier — checked baggage and meals are extra. For two adults travelling with luggage and wanting a meal on a 5-hour flight, the all-in gap between IndiGo and Singapore Airlines (which bundles bag + meal in standard economy) can narrow significantly. In peak months like June, the gap sometimes nearly disappears. Always compare all-in fares, not just base.
Does Singapore Airlines fly directly from Mumbai to Singapore?
Yes — Singapore Airlines operates direct Mumbai–Singapore (BOM–SIN/Changi) service in 2026. It's one of SIA's well-served India routes. They typically use larger aircraft on this sector than IndiGo's A320s, with full in-flight entertainment and meal service included in standard economy.
Do Indian citizens need a visa for Singapore?
Indian passport holders can apply for a Singapore e-visa (eVisa). The process is online through Singapore's ICA (Immigration and Checkpoints Authority) website. Verify the current eligibility and fee on the official ICA portal before booking — terms and processing times can update. Most approvals come through within a few business days.
When should I book Mumbai–Singapore flights for June travel?
Book by March at the latest for June travel — ideally in February. June is peak season for BOM–SIN (Indian school holidays, high two-way leisure demand), and the affordable fare buckets on both IndiGo and Singapore Airlines sell out months in advance. Waiting until May for June departure typically means paying full-fare inventory.
Is September a good time to visit Singapore from Mumbai?
Yes — September is one of the best-value months to fly Mumbai–Singapore. Fares are soft (school terms are back, no major Indian festival clusters), Singapore's weather is typical tropical (occasional showers but manageable), and the city is in its quieter inbound period before the year-end rush. Hotels are also more reasonably priced than in June or December.