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I tried looking for a flight from Bangalore to London and London to Denver.

Bangalore to Mumbai. 16 hour layover. Mumbai to London. London to Dallas. Dallas to Denver. ----- 48K

When I searched for Mumbai to London and London to Denver:

Mumbai to London. London to Dallas. Dallas to Denver. ---- 54K

Why is the second option costlier when its actually one flight lesser than the previous one.

The flights are for the same day and same flights. I have verified that.

closed as primarily opinion-based by JoErNanO, choster, Karlson, Andrew Ferrier, VMAtm Mar 18 '15 at 16:03

Many good questions generate some degree of opinion based on expert experience, but answers to this question will tend to be almost entirely based on opinions, rather than facts, references, or specific expertise. If this question can be reworded to fit the rules in the help center, please edit the question.

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    Not sure if this question is on-topic... – gmauch Mar 12 '15 at 12:11
  • Did you price up BLR/LHR/DEN as well? I'd guess it'd be similar to the Mumbai price, with the one with the extra layover costing less to make up for the fact that it's less attractive with another stop – Gagravarr Mar 12 '15 at 12:42
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    See Doc's overview of airline pricing for the reasoning behind some superficially illogical fare patterns. – choster Mar 12 '15 at 14:15
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See our question on hidden city ticketing.

From PriceofTravel, on why it happens:

Airfare pricing is extremely complicated and often an airline has the choice of running certain segments at a loss by discounting seats, or a bigger loss by flying mostly empty with higher fares. They need to get their planes back into the more profitable positions on their route map, so they discount heavily only when they have to, and they’ll balance that with profits on routes that other airlines aren’t bothering with at all.

So perhaps at this time of year, Bangalore to Mumbai can be easily discounted for a small loss by the airline, and then get more bodies onto the pricier flights, making them always have full planes there, and this works out as less of an issue for them than just making the Mumbai->Denver routes cheaper.

Sometimes when the last segment is the pricey one, and you're only going to say, B instead of C, on a A-B-C route, it's sometimes cheaper to buy the longer, cheaper flight and throw away the last ticket. Of course, this doesn't work if you need to get to C. We have several questions on this (search throwing away, or not taking tickets).

As an example, a friend bought a Bolivia->Chile return flight, because it was cheaper than the one-way flight. He just threw away the second ticket :) Airlines do frown on it, however...

I also recommend that PriceofTravel article on Hidden Ticketing for a longish read anyway, it's quite eye-opening.

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