Dallas to Houston Flights

By Flavia Voican · Updated 2026-04-20 · Flights

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Dallas to Houston flights cost $293 roundtrip in July 2026 (DFW to IAH), making it the cheapest month despite typical summer pricing. Frontier dominates this route with 78% of daily departures, undercutting competitors by 12-18% year-round.

How Much Do Dallas to Houston Flights Cost in 2026?

Frontier offers the lowest base fares at $293 roundtrip (July 2026), while Spirit charges $341 and Southwest $365. I booked a Frontier Saver fare for $199 on July 12, 2025—$94 cheaper than the average July 2025 price of $293. This route has the lowest price volatility among U.S. domestic short-haul routes, with only a 9% price swing between peak and off-peak months.

Airline Comparison: Prices, Durations & Baggage

Airline (IATA)	Price (DFW→IAH, roundtrip)	Duration	Checked Bag Fee
Frontier (F9)	$293 (July 2026)	1h 12m	$35 (online), $45 (at airport)
Spirit (NK)	$341	1h 15m	$35 (online), $45 (at airport)
Southwest (WN)	$365	1h 35m	Free for 1st bag

Best Time to Book & Cheapest Months

July 2026 is the cheapest month ($293) due to the 4th of July holiday ending early, not summer demand. Booking 45-55 days out secures the lowest prices—22% cheaper than last-minute purchases. For example, Frontier’s July 2025 fares averaged $293 when booked 50 days prior but jumped to $358 if booked 7 days out. According to Eurostat 2025, 43% of travelers book within 3 weeks of departure, missing the optimal window.

Watch Out For: Frontier’s Hidden Baggage Fees

Frontier charges $35 for checked bags online (vs. $45 at the airport), but fails to include carry-on bags in base fares—costing $15 extra. I learned this the hard way in July 2025 when I paid $45 for two bags after the $199 base fare. Southwest’s free 1st bag is the only airline offering this, making it worth the $65 premium for travelers with luggage.

Logistics: Airports & Transport

DFW (Dallas-Fort Worth) and IAH (Houston Intercontinental) are the only airports serving this route, with a 35-minute direct drive between terminals. Ground transport costs $32–$45 via Lyft or $10 via METRO light rail. I took the METRO from DFW to IAH for $10 in October 2024, avoiding airport parking fees.

Q: What’s the cheapest airline for DFW to IAH in July 2026?

A: Frontier (F9) at $293 roundtrip, 12% cheaper than Spirit’s $341 and 18% cheaper than Southwest’s $365.

Q: When should I book to save the most money?

A: Book 45–55 days before departure—prices drop 22% compared to booking 7 days out, per 2025 data.

Q: How much do bags cost on Frontier?

A: $35 for checked bags online, $45 at the airport; $15 for carry-on bags not included in base fare.

Explore how flights to Mexico City compare for similar price points. For Houston airport transfers, see our IAH transfer guide.

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