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Prepaid expenses and other current assets | 12 Months Ended
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Dec. 31, 2018
Prepaid expenses and other current assets |
Prepaid expenses and other current assets | 10. Prepaid expenses and other current assets An analysis of prepaid expenses and other current assets at December 31, 2018, 2017 and 2016 is as follows:
|  | 2018 |  | 2017 |  | 2016
Advances to suppliers |  | Ps. | 273,251 |  | Ps. | 346,263 |  | Ps. | 705,105
Prepaid aircraft rent |  |  | 274,254 |  |  | 215,784 |  |  | 668,306
Prepaid insurance |  |  | 76,896 |  |  | 68,712 |  |  | 47,663
Other prepaid expenses |  |  | 22,682 |  |  | 65,642 |  |  | 33,555
Sales commission to travel agencies (Note 1d) |  |  | 59,620 |  |  | 54,501 |  |  | 73,413
Advances for constructions of aircraft and engines |  |  | — |  |  | 13,764 |  |  | 31,437
Loss on sale and leaseback transactions to be amortized (Note 14) |  |  | 3,047 |  |  | 3,047 |  |  | 3,047
|  | Ps. | 709,750 |  | Ps. | 767,713 |  | Ps. | 1,562,526

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