Typically, we don't like questions regarding "cheapest" planning on the site - see a very old debate here called The WANTA™ debate (We are not travel agents). It's also documented in our on-topic details page:

asking to have your travel itinerary constructed, including flight scheduling, budgeting and finding accommodation. Such questions cannot be answered as there are too many variables and personal preferences to account for, and are unlikely to be of use to others. An actual travel agent may be of assistance.

So a question about cheapest / best on a specific date or time period is off-topic as that's a "shopping" question.

I do agree overall with this comment from hippietrail above, which is a grey area where some "cheapest" questions are okay:

I agree any question wanting current absolute cheapest ticket is not OK for the site. But questions wanting generally cheapest way or route is OK for the site. Especially when OPs do a decent job of explaining their criteria.

Typically, we don't like questions regarding "cheapest" planning on the site - see a very old debate here called The WANTA™ debate (We are not travel agents). It's also documented in our on-topic details page:

asking to have your travel itinerary constructed, including flight scheduling, budgeting and finding accommodation. Such questions cannot be answered as there are too many variables and personal preferences to account for, and are unlikely to be of use to others. An actual travel agent may be of assistance.

So a question about cheapest / best on a specific date or time period is off-topic as that's a "shopping" question.

I do agree overall with this comment from hippietrail above, which is a grey area where some "cheapest" questions are okay:

I agree any question wanting current absolute cheapest ticket is not OK for the site. But questions wanting generally cheapest way or route is OK for the site. Especially when OPs do a decent job of explaining their criteria.

Typically, we don't like questions regarding "cheapest" planning on the site - see a very old debate here called The WANTA™ debate (We are not travel agents). It's also documented in our on-topic details page:

asking to have your travel itinerary constructed, including flight scheduling, budgeting and finding accommodation. Such questions cannot be answered as there are too many variables and personal preferences to account for, and are unlikely to be of use to others. An actual travel agent may be of assistance.

So a question about cheapest / best on a specific date or time period is off-topic as that's a "shopping" question.

I do agree overall with this comment from hippietrail above, which is a grey area where some "cheapest" questions are okay:

I agree any question wanting current absolute cheapest ticket is not OK for the site. But questions wanting generally cheapest way or route is OK for the site. Especially when OPs do a decent job of explaining their criteria.

Typically, we don't like questions regarding "cheapest" planning on the site - see a very old debate here called The WANTA™ debate (We are not travel agents). It's also documented in our on-topic details page:

asking to have your travel itinerary constructed, including flight scheduling, budgeting and finding accommodation. Such questions cannot be answered as there are too many variables and personal preferences to account for, and are unlikely to be of use to others. An actual travel agent may be of assistance.

So a question about cheapest / best on a specific date or time period is off-topic as that's a "shopping" question.

I do agree overall with this comment from hippietrail above, which is a grey area where some "cheapest" questions are okay:

I agree any question wanting current absolute cheapest ticket is not OK for the site. But questions wanting generally cheapest way or route is OK for the site. Especially when OPs do a decent job of explaining their criteria.