Lennard Allen Jr. appeals his sentence of imprisonment for 70 months for conspiracy to possess with intent to distribute cocaine. See 21 U.S.C. §§ 841(b)(l)(A)(ii), 846. Allen argues that the district court relied too heavily on the advisory Sentencing Guidelines and imposed an unreasonable sentence. Allen contends, alternatively, that the district court should have granted a downward departure based on his “extraordinary” circumstances. We affirm.

“Review for reasonableness is deferential.” United States v. Talley, 431 F.3d 784, 788 (11th Cir. 2005). “[T]he party who challenges the sentence bears the burden of establishing that the sentence is unreasonable in the light of both [the] record and the factors in section 3553(a).” Id. “When we review a sentence for reasonableness, we do not, as the district court did, determine the exact sentence to be imposed.” Id. ‘We must evaluate whether the sentence imposed by the district court fails to achieve the purposes of sentencing as stated in section 3553(a).” Id. “[W]hen the district court imposes a sentence within the advisory Guidelines range, we ordinarily will expect that choice to be a reasonable one.” Id. Arguments raised for the first time on appeal are reviewed for plain error. United States v. Raad, 406 F.3d 1322, 1323 (11th Cir.), cert. denied, 546 U.S. 893, 126 S.Ct. 196, 163 L.Ed.2d 207 (2005).

*913 Allen’s main argument fails. Allen’s sentence of 70 months of imprisonment, which was the low end of the advisory guidelines range, was reasonable. The transcript of the sentencing hearing establishes that the district court sentenced Allen after careful consideration of Allen’s arguments in favor of mitigation, the Guidelines, and the sentencing factors of section 3553(a).

Allen contends, alternatively, that the district court erred by failing to revisit possible downward departures not mentioned in the presentence investigation report, see U.S.S.G. § 5K1.1, et seq., but this argument also fails. Because Allen failed to object to the calculation of the Guidelines range before the district court, we review for plain error. Allen cites no authority for his argument that the district court was obliged to consider sua sponte possible downward departures not mentioned either in the presentence report or by Allen at the sentencing hearing. The district court did not plainly err.

Allen’s sentence is

AFFIRMED.