Express takes $15 off orders of $30 or more, $30 off orders of $75 or more, or $60 off orders of $150 or more via coupon code "1606". They're the best dollar-off coupons we've seen from Express this year. Shipping starts at $8 and sales tax is added where applicable. Deal ends July 29.
A best bet is the Express Men's Blake Loose Fit Boot Cut Jeans in Black Rinse (pictured) for $79.90 before the coupon above, $49.90 after. With $8 for shipping, that's $30 off and the lowest total price we could find. They're available in sizes 29x30 to 38x34.