Ruling on using points offered by airline companies
Question

                I am a student who has been sponsored (by the government) to study in Canada and I travel a great deal, approximately once a year. There are several airline companies that offer flights from Saudi to Canada and vice versa. A number of these airline companies seek to attract customers by offering points that can be collected and used in the future, if one accumulates a lot, to get large discounts on the price of airline tickets. I have a preference for one of these companies because after travelling with them several times, it is possible to travel for less than one quarter of the price of the ticket, and sometimes it is possible to pay only the compulsory airline tax and not to pay the price of the ticket. My question is: what is the ruling on choosing these travel companies instead of others in order to make use of the points system? What is the ruling on using them to pay what may be as little as one tenth of the price? Please note that I have already booked using them and have paid approximately one tenth of the price and the taxes only, and I will not be able to cancel the booking.
Praise be to Allah.
    What appears to be the case is that there is nothing wrong 
    with you using these points that are offered by the airline companies and 
    benefitting from them to reduce the price of the airline ticket, because 
    this comes under the heading of selling the tickets for less than the usual 
    price, if he is going to pay some of the price. This is permissible 
    according to the majority of scholars, because sales and rentals are based 
    on mutual consent from both parties. Allah, may He be exalted, says 
    (interpretation of the meaning): “O you who 
    believe! Eat not up your property among yourselves unjustly except it be a 
    trade amongst you, by mutual consent” [an-Nisa’ 4:29]. 
    If the seller agrees to sell his product for less than the usual price, that 
    is permissible. 

    See the answer to question no.
    7842.

    Al-Hawaafiz at-Tijaariyyah by 
    Dr. Khaalid al-Muslih, p. 160-167 

    A similar case is if the customer will get the tickets for 
    free after some time. This is also permissible, because it is a gift from 
    the seller to the purchaser. Ibn Rushd said: There is no problem with being 
    easy-going with regard to the price when selling, or reducing it. 

    See: Al-Hawaafiz at-Tijaariyyah, p. 164 

    However it is essential to be careful in that regard and 
    ensure that the price of the original ticket from this company was not 
    greater than the price from similar companies, because the purchaser is only 
    tempted to buy because of what he was hoping for of advantages or discounts 
    after that. 

    Shaykh Ibn ‘Uthaymeen (may Allah have mercy on him) was 
    asked: 

    We have a car repair workshop and carwash; we have printed 
    cards on which it is written: Collect four cards for oil change and car 
    wash, and get a car wash for free. Is there anything prohibited in what we 
    are doing? Perhaps you could give us some guidelines with regard to contests 
    and the like? 

    He replied: 

    There is nothing prohibited in that so long as the price has 
    not been increased for the sake of offering this gift. 

    But if the customer will either be a winner or a loser, then 
    this is not permissible, because if he will be either a winner or a loser, 
    then it comes under the heading of gambling. But if he will either be a 
    winner or will lose nothing, then he will not be harmed at all; either he 
    will gain something or he will not gain anything, but he will not lose 
    anything.

    End quote from al-Liqa’ ash-Shahri, 1/25 

    For more information please also see fatwa no.
    22085

    And Allah knows best.